Unexpectedly high corneal flap thickness and ectasia after mechanical LASIK / Espessura inesperadamente alta do flap corneano e ectasia após LASIK mecânico

ABSTRACT LASIK is a refractive surgical procedure in which a corneal flap is created to expose the corneal stromal bed. Preoperative estimation of corneal flap thickness is necessary to calculate the percentage tissue altered in LASIK, an important quantitative risk factor for ectasia. The objective of this study was to assess flap thickness and calculate percentage tissue altered to check if unexpectedly thicker flaps and higher percentage tissue altered could pose as risk factors of ectasia. Four subjects (eight eyes) were submitted to mechanical LASIK in 2009 and 2010. Pre and postoperative clinical and tomographic data were reviewed. Mean preoperative estimated percentage tissue altered was 39.18±1.31%, which was borderline for increased ectasia risk when considering the limit of 40%. However, when considering the postoperatively measured flap thickness, the actual mean percentage tissue altered turned out to be 45.17 ± 4.13%, which was significantly higher than predicted preoperatively (p=0.002). Unexpectedly higher postoperative percentage tissue altered may be responsible for corneal ectasia after mechanical LASIK.

RESUMO A LASIK é um procedimento cirúrgico refrativo, no qual um retalho corneano é criado para expor o leito estromal corneano. A estimativa pré-operatória da espessura do retalho corneano é necessária para calcular o percentual de tecido alterado no LASIK, um importante fator de risco quantitativo para ectasia. O objetivo deste estudo foi avaliar a espessura do retalho e calcular o percentual de tecido alterado para verificar se retalhos inesperadamente mais espessos e percentuais de tecido alterado mais altos poderiam representar fatores de risco de ectasia. Quatro indivíduos (oito olhos) foram submetidos à LASIK mecânica em 2009 e 2010. Dados clínicos e tomográficos pré e pós-operatórios foram revisados. A média de percentual de tecido alterado pré-operatória estimada foi de 39,18±1,31%, limítrofe para risco aumentado de ectasia quando considerado o limite de 40%. No entanto, ao considerar a espessura do retalho medida no pós-operatório, o percentual de tecido alterado médio real foi de 45,17±4,13%, ou seja, significativamente maior do que o previsto no pré-operatório (p=0,002). O percentual de tecido alterado pós-operatóriao inesperadamente mais alto pode ser responsável pela ectasia da córnea após LASIK mecânico.

A prospective study on the safety and efficacy of excimer laser coronary angioplasty for the treatment of degenerated great saphenous vein graft / 中华心血管病杂志

Objective: To explore the safety and efficacy of excimer laser coronary angioplasty (ELCA) for the treatment of degenerated great saphenous vein graft (SVG). Methods: This is a single-center, prospective, single-arm study. Patients, who were admitted to the Geriatric Cardiovascular Center of Beijing Anzhen Hospital from January 2022 to June 2022, were consecutively enrolled. Inclusion criteria were recurrent chest pain after coronary artery bypass surgery (CABG), and coronary angiography confirmed that the SVG stenosis was more than 70% but not completely occluded, and interventional treatment for SVG lesions was planned. Before balloon dilation and stent placement, ELCA was used to pretreat the lesions. Optical coherence tomography (OCT) examination was performed and postoperative index of microcirculation resistance (IMR) were assessed after stent implantation. The technique success rate and operation success rate were calculated. The technique success was defined as the successful passage of the ELCA system through the lesion. Operation success was defined as the successful placement of a stent at the lesion. The primary evaluation index of the study was IMR immediately after PCI. Secondary evaluation indexes included thrombolysis in myocardial infarction (TIMI) flow grade, corrected TIMI frame count (cTFC), minimal stent area and stent expansion measured by OCT after PCI, and procedural complications (Ⅳa myocardial infarction, no reflow, perforation). Results: A total of 19 patients aged (66.0±5.6) years were enrolled, including 18 males (94.7%). The age of SVG was 8 (6, 11) years. The length of the lesions was greater than 20 mm, and they were all SVG body lesions. The median stenosis degree was 95% (80%, 99%), and the length of the implanted stent was (41.7±16.3)mm. The operation time was 119 (101, 166) minutes, and the cumulative dose was 2 089 (1 378, 3 011)mGy. The diameter of the laser catheter was 1.4 mm, the maximum energy was 60 mJ, and the maximum frequency was 40 Hz. The technique success and the operation success rate were both 100% (19/19). The IMR after stent implantation was 29.22±5.95. The TIMI flow grade of patients after ELCA and stent implantation was significantly improved (all P>0.05), and the TIMI flow grade of all patients after stent implantation was Grade Ⅲ. The cTFC decreased significantly after ELCA (33.2±7.8) and after stent placement (22.8±7.1) than preoperative level (49.7±13.0) (both P<0.001). The minimum stent area was (5.53±1.36)mm2, and the stent expansion rate was (90.0±4.3)%. Perforation, no reflow, type Ⅳa myocardial infarction and other complications were not observed. However, postoperative high-sensitivity troponin level was significantly increased ((67.937±33.839)ng/L vs. (5.316±3.105)ng/L, P<0.001). Conclusion: ELCA is safe and effective in the treatment of SVG lesions and could improve microcirculation and ensure full expansion of stent.

Alteraciones estructurales y funcionales en pacientes con ambliopía / Structural and Functional Alterations in Patients with Amblyopia

Objetivo: Determinar los resultados motores post cirugía refractiva corneal con láser de excímero en pacientes miopes con o sin astigmatismo asociado. Método: Se realizó un estudio preexperimental del tipo antes y después, en el que fueron incluidos 81 pacientes (162 ojos) tratados con LASEK-MMC (65 pacientes) o PRK-MMC (16 pacientes) seguidos por tres meses. Se les realizó un examen oftalmológico completo y se evaluaron las siguientes variables: punto próximo de convergencia, la amplitud de convergencia, divergencia y el alineamiento ocular precirugía y poscirugía. Resultados: Con la cirugía se observó un incremento significativo del punto próximo de convergencia (LASEK-MMC: p = 0,000 y PRK-MMC: p = 0,021). La amplitud de convergencia de cerca y de lejos, así como la amplitud de divergencia tendieron a disminuir, pero la diferencia no fue significativa (p > 0,05). Aumentó el porcentaje de pacientes con exodesviaciones de cerca, después de la cirugía LASEK-MMC (26,2 por ciento → 60,0 por ciento, p = 0,000) y de la PRK-MMC (18,8 por ciento → 81,3 por ciento, p = 0,000), y predominaron las heteroforias pequeñas en ambos casos (LASEK-MMC: 52,3 por ciento y PRK-MMC: 75,0 por ciento). Conclusiones: Con la cirugía fotoablativa con láser, aumentaron las exodesviaciones en el posoperatorio, pero se trató fundamentalmente de heteroforias pequeñas, aunque un número reducido de pacientes desarrolló nuevas exodesviaciones(AU)

Objective: To determine the motor results after corneal refractive surgery with excimer laser in myopic patients with or without associated astigmatism. Method: A pre-experimental study of the before and after type was carried out, in 81 patients (162 eyes) treated with LASEK-MMC (65 patients) or PRK-MMC (16 patients) followed up for three months. A complete ophthalmological examination was performed and the variables were evaluated near point of convergence, amplitude of convergence, divergence, and pre-surgery and postsurgery ocular alignment. Results: A significant increase in the near point of convergence was observed with surgery (LASEK-MMC: p = 0.000 and PRK-MMC: p = 0.021). The amplitude of convergence near and far, as well as the amplitude of divergence tended to decrease, but the difference was not significant (p > 0.05). The percentage of patients with near exodeviations increased after LASEK-MMC surgery (26.2 percent → 60.0 percent, p = 0.000) and PRK-MMC (18.8 percent → 81.3 percent, p = 0.000), and small heterophoria predominated in both cases (LASEK-MMC: 52.3 percent and PRK-MMC: 75.0 percent). Conclusions: The laser photoablative surgery increased postoperative exodeviations, but they were mainly small heterophoria, although a small number of patients developed new exodeviations(AU)

Resultados motores en cirugía fotoablativa en pacientes miopes / Motor Outcomes of Photoablative Surgery in Myopic Patients

Objetivo: Determinar los resultados motores post cirugía refractiva corneal con láser de excímero en pacientes miopes con o sin astigmatismo asociado. Método: Se realizó un estudio preexperimental del tipo antes y después, en el que fueron incluidos 81 pacientes (162 ojos) tratados con LASEK-MMC (65 pacientes) o PRK-MMC (16 pacientes) seguidos por tres meses. Se les realizó un examen oftalmológico completo y se evaluaron las siguientes variables: punto próximo de convergencia, la amplitud de convergencia, divergencia y el alineamiento ocular precirugía y poscirugía. Resultados: Con la cirugía se observó un incremento significativo del punto próximo de convergencia (LASEK-MMC: p = 0,000 y PRK-MMC: p = 0,021). La amplitud de convergencia de cerca y de lejos, así como la amplitud de divergencia tendieron a disminuir, pero la diferencia no fue significativa (p > 0,05). Aumentó el porcentaje de pacientes con exodesviaciones de cerca, después de la cirugía LASEK-MMC (26,2 por ciento → 60,0 por ciento, p = 0,000) y de la PRK-MMC (18,8 por ciento → 81,3 por ciento, p = 0,000), y predominaron las heteroforias pequeñas en ambos casos (LASEK-MMC: 52,3 por ciento y PRK-MMC: 75,0 por ciento). Conclusiones: Con la cirugía fotoablativa con láser, aumentaron las exodesviaciones en el posoperatorio, pero se trató fundamentalmente de heteroforias pequeñas, aunque un número reducido de pacientes desarrolló nuevas exodesviaciones(AU)

Objective: To determine the eye movement outcomes after excimer laser corneal refractive surgery in myopic patients with or without associated astigmatism. Methods: A preexperimental, before-and-after study was carried out with 81 patients (162 eyes) treated with laser-assisted subepithelial keratectomy (LASEK) (65 patients) or photorefractive keratectomy (PRK) (16), with intraoperative application of mitomycin-C (MMC) in both cases, and followed for three months. A complete ophthalmologic examination was performed and the following variables were evaluated before and after the surgery: near convergence point, convergence amplitude, divergence and ocular alignment. Results: With surgery, a significant increase in the near point of convergence was observed (LASEK-MMC: P=0.000; PRK-MMC: P=0.021). The near and far convergence amplitude tended to decrease, but the difference was not significant (P > 0.05). The percentage of patients with near exodeviations increased after LASEK-MMC (26.2 percent → 60.0 percent, P=0.000) and PRK-MMC (18.8 percent → 81.3 percent, P=0.000), while small heterophorias predominated in both cases (LASEK-MMC: 52.3 percent and PRK-MMC: 75.0 percent). Conclusions: With laser photoablative surgery, exodeviations increased after surgery, but these were primarily small heterophorias, although a small number of patients developed new exodeviations(AU)

Resultados refractivos y visuales en cirugía fotoablativa en pacientes miopes / Refractive and visual results in photoablative surgery in myope patients

Objetivo: Evaluar los resultados refractivos y visuales post cirugía refractiva corneal con láser de excímero (LASEK-MMC o PRK-MMC) en pacientes miopes con o sin astigmatismo asociado. Método: Se realizó un estudio preexperimental del tipo antes y después, en el que fueron incluidos 81 pacientes (162 ojos) tratados con LASEK-MMC (65 pacientes) o PRK-MMC (16 pacientes) seguidos por tres meses. Se les realizó un examen oftalmológico completo y se evaluaron las variables: edad, sexo, diagnóstico y tipo de miopía, así como agudeza visual, esfera, cilindro, equivalente esférico precirugía y poscirugía. Además, se analizó la función visual y los resultados de la refracción. Resultados: El valor de la mediana de edad fue de 24,0 años en los pacientes tratados con LASEK-MMC y en el grupo con PRK-MMC fue de 23,0 años. En ambos grupos existió un predominio del sexo femenino. La totalidad de los pacientes tratados presentaba un astigmatismo miópico compuesto con niveles de miopía leve. A los tres meses el 96,9 por ciento de los pacientes tratados con LASEK-MMC y el 93,8 por ciento de los tratados con PRK-MMC tenían una agudeza visual no corregida de 20/20 o más y todos tenían una visión de 20/40 o más. Conclusiones: La cirugía fotoablativa con láser tiene buenos resultados refractivos y visuales ya que la mayoría de los pacientes quedaron emétropes con una marcada mejoría de la agudeza visual sin corrección y de la refracción en el posoperatorio(AU)

Objective: To evaluate refractive and visual outcomes after excimer laser corneal refractive surgery (laser-assisted subepithelial keratectomy [LASEK] or photorefractive keratectomy [PRK], with intraoperative application of mitomycin-C [MMC]) in myopic patients with or without associated astigmatism. Methods: A preexperimental, before-and-after study was carried out with 81 patients (162 eyes) treated with LASEK-MMC (65 patients) or PRK-MMC (16 patients) and followed for three months. A complete ophthalmologic examination was done and the following variables age, sex, diagnosis and type of myopia were assessed, as well as pre-surgery and post-surgery visual acuity, sphere, cylinder and spherical equivalent. In addition, visual function and the refraction results were analyzed. Results: The median age was 24.0 years in the LASEK-MMC group and 23.0 years in the PRK-MMC group. In both groups there was a predominance of the female sex. All treated patients had compound myopic astigmatism with mild myopia. At three months, 96.9 percent of patients treated with LASEK-MMC and 93.8 percent of patients treated with PRK-MMC had uncorrected visual acuity of 20/20 or better, and all had vision of 20/40 or better. Conclusions: Laser photoablative surgery has good refractive and visual outcomes as most patients became emmetropic with marked improvement in uncorrected visual acuity and refraction postoperatively(AU)

Laser topoguiado como redutor de aberrações ópticas pós ceratotomia radial e LIO multifocal / Topoguided laser as a reducer of optical aberrations after radial keratotomy and multifocal LIO

Resumo A cirurgia de catarata com implante de lente intra-ocular é uma das cirurgias mais realizadas no mundo e, atualmente, os pacientes que se submetem a essa cirurgia podem utilizar o implante com lente intraocular (LIO) multifocal como alternativa ao uso de óculos. Um grande desafio para o cirurgião são os pacientes já submetidos previamente a ceratotomia radial (RK), pois além de terem um cálculo biométrico mais desafiador, apresentam importantes aberrações ópticas corneanas, sendo uma contra-indicação para o uso de lentes multifocais para a maioria dos oftalmologistas. Neste artigo, relatamos o caso de uma paciente que foi submetida, na juventude, a uma RK e passou a referir importante incômodo visual após a correção de catarata com facectomia e implante de LIO multifocal. Esta paciente foi submetida a uma ceratectomia fotorrefrativa (PRK) para diminuir as irregularidades da córnea com boa evolução clínica e resultado visual satisfatório. Esse caso chama a atenção para a alternativa do excimer laser topoguiado em casos semelhantes e alerta para o risco do uso desse tipo de lente em córneas irregulares.

Abstract Cataract surgery with intraocular lens implantation is one of the most commonly performed surgeries in the world and, currently, patients who undergo this surgery can use the multifocal intraocular lens (IOL) implant as an alternative to wearing glasses. A great challenge for the surgeon are patients who have previously undergone radial keratotomy (RK), because in addition to having a more challenging biometric calculation, they also have important corneal optical aberrations, being a contraindication for the use of multifocal lenses for most patients. ophthalmologists. In this article, we report the case of a patient who underwent a RK in her youth and started to report an important visual discomfort after cataract correction with facectomy and multifocal IOL implantation. This patient underwent a photorefractive keratectomy (PRK) to reduce corneal irregularities with good clinical evolution and satisfactory visual result. This case draws attention to the alternative of topography-guided laser excimer in similar cases and warns of the risk of using this type of lens in irregular corneas.

Pitiriasis rubra pilaris tratada con lámpara excímero / Pityriasis rubra pilaris treated with excimer lamp

Resumen La pitiriasis rubra pilaris, es una dermatosis inflamatoria papuloescamosa e hiperqueratósica de origen desconocido y de progresión crónica, la cual puede evolucionar incluso a eritrodermia. El presente caso trata de un paciente de 27 años portador del virus de inmunodeficiencia humana, diagnosticado con pitiriasis rubra pilaris tipo IV, inicialmente tratado con corticosteroide tópico y fototerapia, por cuatro meses. Sin embargo, presentó reactivación de las lesiones, por lo que se recurrió a la aplicación de lámpara excímero, utilizada en otras patologías dermatológicas, mas no de uso habitual en la pitiriasis rubra pilaris.

Abstract Pityriasis Rubra Pilaris is an inflammatory papulosquamous and hyperkeratic dermatosis of unknown cause and chronic progression which can envolve even into erythroderma. This case deals with a 27-year old male patient carrier of VIH who was diagnosed with PRP type IV. Initially, it was treated with topical corticosteroid and phototherapy for four months. However, it showed reactivation of the injuries; therefore, excimer lamp was employed, which is used in other dermatologic pathologies but it is not a regular treatment for PRP type IV.

Centration in refractive surgery / Centralização em cirurgia refrativa

ABSTRACT The point of centration for refractive surgery is a theme of great importance that generates considerable discussion among specialists and surgeons in the field. Notably, any changes in light can alter the size of the pupil, and the visual axis of the fixation line to the fovea is unique in each patient. A variety of options have been described in the literature with respect to centration in refractive surgery, and the results differ among these methods. No consensus has been established regarding the ideal refractive surgery technique for evaluation of centration in each patient that will yield a satisfactory surgical result.

RESUMO O ponto de centralização da cirurgia refrativa é tema de grande importância e gera muita discussão entre especialistas e cirurgiões da área. Afinal, qualquer alteração na luz pode alterar o tamanho da pupila, além disso, o eixo visual da linha de fixação para a fóvea é particular em cada paciente. Existem opções para centralização em cirurgia refrativa com resultados diferentes na literatura. Ainda não há consenso sobre a melhor técnica em cirurgia refrativa que avalie cada caso específico visando um resultado cirúrgico final satisfatório.

LASEK-mitomicina C versus PRK-mitomicina C en pacientes con miopía o astigmatismo miópico compuesto / LASEK-mitomycin C versus PRK-mitomycin C in patients with myopia or compound myopic astigmatism

RESUMEN Objetivo: Evaluar los resultados relacionados con la efectividad y la seguridad en el tratamiento con queratectomía subepitelial asistida por láser con mitomicina C versus queratectomía fotorreactiva con mitomicina C en ojos con miopía o astigmatismo miópico compuesto. Métodos: Se realizó un estudio experimental, longitudinal y prospectivo en el Instituto Cubano de Oftalmología Ramón Pando Ferrer entre abril del año 2016 y abril de 2017. Se empleó un muestreo aleatorio simple por el cual se obtuvo la técnica quirúrgica a realizar. El primer ojo operado fue el derecho y a la semana se realizó la cirugía en el ojo izquierdo, en el cual se aplicó la otra técnica quirúrgica. Esto permitió realizar en cada paciente ambas técnicas quirúrgicas. La muestra quedó constituida por 146 ojos (73 pacientes) que cumplían con los criterios de selección. Resultados: El comportamiento preoperatorio entre los dos grupos fue muy similar. En ninguno de los casos existieron diferencias en las variables que se evaluaron (agudeza visual sin corrección, agudeza visual mejor corregida, esfera, cilindro y equivalente esférico). La diferencia entre los valores preoperatorios y los encontrados a los 6 meses del tratamiento quirúrgico en cada grupo fueron estadísticamente significativos (p= 0,000) para todas las variables analizadas, excepto para la agudeza visual mejor corregida en el grupo de ojos tratados con láser con mitomicina C (p= 0,083). El haze y el defecto de epitelización fueron los dos tipos de complicaciones observadas. Conclusiones: Se demostró que ambas técnicas quirúrgicas son efectivas y seguras(AU)

ABSTRACT Objective: Evaluate the effectiveness and safety of laser-assisted subepithelial keratectomy with mitomycin C vs. photoreactive keratectomy with mitomycin C in eyes with myopia or compound myopic astigmatism. Methods: An experimental prospective longitudinal study was conducted at Ramón Pando Ferrer Cuban Institute of Ophthalmology from April 2016 to April 2017. Simple random sampling was used to decide on the surgical technique to be applied. Surgery was first performed on the right eye using one of the techniques, and then one week later on the left eye with the other technique. That way each patient could undergo both surgical techniques. The sample was composed of 146 eyes (73 patients) meeting the inclusion criteria. Results: Preoperative behavior was very similar in the two groups. In neither case were differences found in the variables analyzed (uncorrected visual acuity, best corrected visual acuity, sphere, cylinder and spherical equivalent). The differences between preoperative values and those found six months after surgery in each group were statistically significant for all the variables analyzed (p= 0.000), except for best corrected visual acuity in the group of eyes treated with laser with mitomycin C (p= 0.083). Haze and epithelization defect were the two types of complications observed. Conclusions: It was demonstrated that both surgical techniques are effective and safe(AU)

Coronary Angioscopy Findings before and after Excimer Laser Coronary Angioplasty for Bare-Metal Stent In-Stent Restenosis

No abstract available.

Therapeutic Effect of 308-nm Excimer Laser on Alopecia Areata in an Animal Model

No abstract available.

Observation on therapeutic effect of filiform fire needle assisted 308 nm excimer laser on vitiligo of different parts / 中国针灸

OBJECTIVE@#To compared the therapeutic effect between filiform fire needle assisted 308 nm excimer laser and simple 308 nm excimer laser on vitiligo of different parts.@*METHODS@#Target lesions of 134 patients were divided into an observation group and a control group according to the principle of self-controlled, 201 pieces in each one. In the observation group, filiform fire needle was performed at target lesions. Then target lesions both of the two groups were irradiated with 308 nm excimer laser at the same time. Once every 2 weeks, totally 10 treatments were required. The effective rate and effective rate, color recovery rate and responding time of different parts in the two groups were evaluated 2 weeks after treatment.@*RESULTS@#The effective rate in the observation group was 82.59% (166/201), which was higher than 68.16% (137/201) in the control group (<0.01). The effective rate of face-neck, trunk, limbs and hand-foot were 90.32%, 81.63%, 81.48% and 58.62% respectively in the observation group, which were higher than 82.80%, 69.39%, 51.85% and 31.03% in the control group (<0.01, <0.05). The color recovery rate of different parts in the observation group was higher than the control group, and the effect was faster in the observation group (<0.01, <0.05).@*CONCLUSION@#Filiform fire needle as an adjunctive therapy, combined with 308 nm excimer laser are more effective than simple 308 nm excimer laser for vitiligo of different parts. Combination therapy has a shorter responding time, the face-neck has the best effect and hand-foot has poor effect.

Crosslinking en la cirugía refractiva / Crosslinking in refractive surgery

La cirugía refractiva con la utilización del láser de excimero se ha convertido a nivel mundial en una cirugía muy demandada, por la posibilidad de mejorar no solamente la visión del paciente, sino también su calidad de vida. Estos procedimientos refractivos y los grandes avances tecnológicos de la cirugía refractiva hacen posible la búsqueda de técnicas para fortalecer la córnea y mejorar la estabilidad refractiva. El uso del crosslinking en la cirugía refractiva ha demostrado que podría modificar estos aspectos, y a su vez disminuir la regresión de las ametropías tratadas. Se realizó una búsqueda de diversos artículos publicados en los últimos diez años, con el objetivo de conocer los resultados de la aplicación del crosslinking en la cirugía refractiva corneal. Se utilizó la plataforma Infomed, específicamente la Biblioteca Virtual de Salud(AU)

Excimer laser refractive surgery has become a very much demanded surgical alternative worldwide, due to the possibility of improving not only the patient's vision, but also their quality of life. These refractive procedures as well as the great technological advances in refractive surgery allow the search for techniques to strengthen the cornea and improve refractive stability. The use of crosslinking in refractive surgery has shown that it is possible to modify these aspects and at the same time reduce the regression of the ametropias treated. A search was conducted for papers published in the past ten years, to become acquainted with the results of the application of crosslinking in corneal refractive surgery. Use was made of the platform Infomed, specifically the Virtual Health Library(AU)

Corrección de la alta miopía con implante de lente fáquica ACR-128 / Correction of high myopia with ACR-128 phakic lens implantation

La alta miopía es aquella igual o mayor a -6 dioptrías esféricas, no en función de la curvatura corneal elevada, como es el caso del queratocono, ni por la esclerosis del cristalino que ocurre en etapas preseniles, sino en dependencia de la longitud axial mayor de 25,5 o 26,0 mm. La corrección óptica de estos defectos altos es difícil, ya que es frecuente que los pacientes se sientan incómodos con el uso de gafas, pues no obtienen una buena calidad de visión, y con el fin de mejorarla se han desarrollado distintos procedimientos quirúrgicos. Se presenta una paciente de 26 años de edad con miopía elevada, quien no se adapta a los lentes de contacto y no desea continuar con los espejuelos; no es candidata a la cirugía refractiva corneal. Se le implantaron lentes fáquicas ACR IOL-128 (Soleko, Italia) sin complicaciones. El equivalente esférico preoperatorio -11,5 y -6 dioptrías disminuyó a -1,00 y -0,5 respectivamente, y la agudeza visual sin cristales de cuenta dedos y 0,1 a 0,8 y 0,9 respectivamente. Con este caso se evidencia que las lentes fáquicas son una opción con buenos resultados en la corrección de la alta miopía(AU)

The high myopia, by definition, is that equal or bigger to -6 spherical dioptrías; not in function of the bend high corneal, like it is the case of the queratocono, neither for the sclerosis of the crystalline lens that happens in stages preseniles, but in dependence of the axial longitude bigger than 25,5 or 26,0 mm. The optic correction of these high defects is difficult, since it is frequent that the patients feel uncomfortable with the glasses use, because they don't obtain a good quality of vision and with the purpose of improving it, different surgical procedures have been developed. Young patient 26 years old is presented with high myopia that doesn't adapt to the contact eyeglasseses and she doesn't want to continue with the espejuelos, she is not candidate to surgery refractive corneal and she is implanted eyeglasseses fáquica ACR IOL-128 (Soleko, Italy) without complications. The equivalent spherical preoperatorio -11,5 and -6 dioptrías diminish at -1,00 and - 0,5 respectively and the visual sharpness without glasses of bill fingers and 0,1 at 0,8 and 0,9 respectively. With this case it is evidenced that the lenses fáquicas are an option with good results in the correction of the high myopia(AU)

Epitelización de la interfase después de la técnica de LASIK / Interface epithelialization after surgery LASIK technique

La epitelización de la interfase es una de las complicaciones secundarias a la cirugía refractiva corneal mediante la técnica de LASIK y de SMILE, que pueden influir de forma negativa sobre la calidad visual de los pacientes operados. Se presenta una paciente femenina de 51 años de edad operada de astigmatismo hipermetrópico compuesto de ambos ojos, hace aproximadamente dos años, mediante la técnica de LASIK con microquerátomo pendular. Desde hace 5 meses aproximadamente comenzó con disminución de la visión del ojo derecho, agudeza visual sin corrección del ojo derecho de 0,1 y con corrección de 0,3. Al examen oftalmológico se observaron depósitos blanquecinos en la entrecara del flap corneal, correspondientes a la epitelización de la interfase. Se decidió levantar el flap corneal para eliminar el tejido epitelial de la entrecara; se realizó queratectomía fototerapéutica y se colocó mitomicina C al 0,02 por ciento. La evolución de la paciente fue satisfactoria. La agudeza visual posterior al mes sin corrección del ojo derecho mejoró a 0,5 y con corrección a 0,9, sin mostrar signos de recurrencia(AU)

Interface epithelialization is one of the secondary complications of LASIK and SMILE refractive corneal surgery which may negatively affect the visual quality of operated patients. A female 51-year-old patient presents who underwent surgery about two years ago for compound hyperopic astigmatism of both eyes by LASIK technique with a pendular microkeratome. Approximately five months ago the patient began experiencing gradual visual loss in her right eye. Visual acuity of the right eye was 0.1 without correction and 0.3 with correction. Ophthalmological examination found whitish deposits in the corneal flap interface revealing interface epithelialization. It was decided to lift the corneal flap to remove the epithelial tissue from the interface. Phototherapeutic keratectomy was performed and 0.02 percent mitomycin C applied on the area. The patient's evolution was satisfactory. At one month, visual acuity of the right eye had risen to 0.5 without correction and 0.9 with correction, and no signs of recurrence were observed(AU)

Antecedentes y actualidad de las lentes fáquicas para la corrección de las ametropías / Antecedents and current status of the use of phakic lenses for ametropia correction

La cirugía refractiva es una subespecialidad que comprende todos los procedimientos quirúrgicos dirigidos a modificar la refracción ocular en sus distintas ametropías. Su finalidad es mejorar la agudeza visual no corregida y simultáneamente disminuir la dependencia de los anteojos o lentes de contacto. Existen diferentes opciones como son: los procedimientos queratorrefractivos y los implantes de lentes intraoculares, con extracción del cristalino (pseudofaquia) o en un ojo fáquico, entre la córnea y el cristalino. En ocasiones es necesaria la combinación de más de un procedimiento. Las lentes intraoculares fáquicas pueden dividirse en dos grupos: lentes de cámara anterior, que incluye las de soporte angular y las de fijación iridiana, y lentes de cámara posterior, que son las implantadas en surco. A diferencia de la cirugía láser sobre la córnea o de la cirugía del cristalino, la corrección de ametropías moderadas-severas mediante estas lentes permite mantener la acomodación, además de obtener una mejor calidad óptica, cierta reversibilidad del procedimiento y la posibilidad de mejorar defectos refractivos residuales mediante la cirugía corneal mínima. De ahí la motivación para realizar una búsqueda de diversos artículos publicados, con el objetivo de describir todos los tipos de lentes intraoculares en ojos fáquicos y sus ventajas. Se utilizó la plataforma Infomed, específicamente la Biblioteca Virtual de Salud, con todos sus buscadores(AU)

Refractive surgery is a subspecialty comprising all the surgical procedures aimed at modifying ocular refraction in its various ametropias. Its aim is to improve uncorrected visual acuity, reducing dependence on eyeglasses or contact lenses. There are different options, such as keratorefractive procedures and intraocular lens implantation, with removal of the crystalline lens (pseudophakia) or in phakic eyes, between the cornea and the crystalline lens. A combination of more than one procedure is sometimes required. Phakic intraocular lenses are divided into two groups: anterior chamber lenses, including the angle-supported and iris fixation types, and posterior chamber lenses, performed by sulcus implantation. Unlike laser corneal or crystalline lens surgery, correction of moderate-to-severe ametropia using these lenses makes it possible to retain accommodation, and provides better optical quality, a certain reversibility of the procedure, and the possibility of correcting residual refractive defects by minimum corneal surgery. Hence the motivation to conduct an updated search in various published papers with the purpose of describing all the types of phakic intraocular lenses and their advantages. Use was made of the Infomed platform, particularly the Virtual Health Library with all its search engines(AU)

Study of accuracy of corneal flap thickness by using femtosecond laser technology

Background: LASIK is the most popular surgery to correct the refractive errors nowadays. It is proved to be safe, effective and well predictable. It is important to produce a uniform flap with a narrow SD from the intended thickness. The Integrated optical pachymetry is a convenient and useful feature of the EX500 excimer laser which can be used to measure flap thickness intraoperatively

Objectives: this study aimed to detect the accuracy of Allegretto Wave light FS200[TM] platform in creation of different corneal flap thicknesses

Patients and Methods: sixty eyes of 30 myopic patients were included in our study, the patients were operated by 2 different surgeons from June 2017 till December 2017. The patients were distributed randomly into 3 studied groups. Group I [20 eyes with intended fs flap 100um], group II [20 eyes with intended fs flap 110um] and group III [20 eyes with intended fs flap 120um]. All participants were subjected to full medical history taking, uncorrected distance visual acuity, slit-lamp microscopy, corneal topography using oculus[registered] pentacam device, manifest and cycloplegic refraction, corrected distance visual acuity, fundus bio-microscopy examination using 90 D lens

Results: in this study 100 micro m thickness group [Group A] showed the lowest difference between the mean result and the intended flap [-0.35um] followed by the 120 micro m group [Group C] with difference of [-2.9um] between the mean result and the intended flap thickness followed by the 110 micro m group [group B] with the highest difference [-3.45um] from the intended flap thickness

Conclusion: the flaps made with the Wavelight FS200 femtosecond laser were predictable and uniform more predictable in group A than in group C and B, but with no statistical significance between the three studied groups [P=0.402]

Corneal Power Determination with Corneal Tomography after Refractive Surgery with Excimer Laser / Determinación del poder corneal con un tomógrafo corneal luego de cirugía refractiva con láser excimer / Determinação da potência corneana com uma topografia de córnea após cirurgia refrativa com excimer láser

Introduction. Corneal power determination after refractive surgery with excimer laser is complex. Different alternatives with the use of corneal tomography have been used for this measurement. Objective. To evaluate various methods of determination of corneal power in patients undergoing photorefractive surgery, including diagnostic tests with quantitative measurements. Methodology. This is a retrospective observational study. We included patients undergoing photorefractive surgery with refractive results and post-operative corneal tomography taken at least ten weeks after surgery. Results. In myopic eyes, significant differences were found in the value determined by the keratometry derived from the clinical history when compared with the average post-operative manual keratometry, the simulated 32keratometry and the Mean Pupil Power of the Sirius®tomograph. On another note, when averaging the mean post-operative manual keratometry with the post-operative Mean Pupil Power (value called Kpopaverage 1) and comparing it with the keratometry derived from the clinical history method, no statistically significant differences were observed in myopic patients. Likewise, when averaging the simulated post-operative keratometry of the Sirius® equipment with the post-operative Mean Pupil Power (value called "Kpop average 2") and comparing it with the keratometry derived by the method of the clinical history, no statistically significant differences were observed in myopic patients. On the other hand, in hyperopic eyes and those with mixed astigmatism, mean errors from post-operative Mean Pupil Power, in comparison to the keratometry derived by clinical history method, were not significantly different from the errors when comparing the "Kpop average 1" and the "Kpop average 2"with keratometry derived by the clinical history method. Conclusions. In myopic eyes the post-operative corneal power determinations with the "Kpop average 1" and "Kpop average 2" are closer to the keratometry derived by clinical history method than to measurements from the average post-operative manual keratometry, the post-operative simulated keratometry or the Mean Pupil Power of the Sirius® equipment.

Introducción. La determinación del poder corneal, después de la cirugía refractiva con láser excimer, es difícil. Diferentes alternativas con el uso de tomógrafos corneales se han utilizado para esta medición. Objetivo. Evaluar diversos métodos de determinación del poder corneal en pacientes operados de cirugía fotorrefractiva, incluyendo pruebas diagnósticas con medidas cuantitativas. Metodología. Estudio retrospectivo de pacientes operados de cirugía fotorrefractiva que tuvieran resultados refractivos y tomografía corneal post-operatoria al menos diez semanas luego de cirugía. Resultados. En los ojos miopes se encontraron diferencias significativas en el valor determinado por la queratometría derivada de la historia clínica al compararla con la queratometría manual promedio postoperatoria, la queratometría simulada y el Mean Pupil Power del tomógrafo Sirius®. Por otra parte, al promediar la queratometría manual promedio postoperatoria con el Mean Pupil Power postoperatorio (valor denominado Kpop promedio 1) y compararla con la queratometría derivada por el método de la historia clínica, no se observaron en los pacientes miopes diferencias estadísticamente significativas. Asimismo, al promediar la queratometría simulada postoperatoria del equipo Sirius® con el Mean Pupil Power postoperatorio (valor denominado Kpop promedio 2) y compararla con la queratometría derivada por el método de la historia clínica tampoco se observaron en los pacientes miopes diferencias estadísticamente significativas. Por otro lado, en los ojos hipermétropes y con astigmatismo mixto, los promedios de los errores del Mean Pupil Power postoperatorio, con respecto a la queratometría derivada por el método de la historia clínica, no fueron significativamente diferentes de los errores al comparar la Kpop promedio 1 y la Kpop promedio 2 con la queratometría derivada por el método de la historia clínica. Conclusiones. En ojos miopes las determinaciones del poder corneal postoperatorio con las Kpop promedio 1 y Kpop promedio 2 se aproximan más a la queratometría derivada por el método de la historia clínica que a las mediciones de la queratometría manual promedio postoperatoria, la queratometría simulada postoperatoria o el Mean Pupil Power del equipo Sirius®. [Jaramillo LC, Galvis V, Tello A, Camacho PA, Castillo A, Pareja LA. Determinación del poder corneal con un tomógrafo corneal luego de cirugía refractiva con láser excimer. MedUNAB. 2018;21(1):16-30. doi:1029375/01237047.2397].

Introdução. A determinação da potência corneana, após a cirurgia refrativa com excimer láser, é difícil. Foram usadas diferentes alternativas com o uso de tomógrafos de córnea para esta medição. Objetivo. Avaliar vários métodos de determinação da potência corneana em pacientes submetidos à cirurgia fotorrefrativa, incluindo testes diagnósticos com medidas quantitativas. Métodos. Este é um estudo observacional retrospectivo. Foram incluídos pacientes submetidos à cirurgia fotorrefrativa com resultados refrativos e topografía corneana pós-operatória pelo menos um mês após a cirurgia. Resultados. Nos olhos míopes foram encontradas diferenças significativas no valor determinado pela ceratectomia derivada da história clínica, quando comparada com a média da ceratectomia manual pós-operátoria, a ceratectomia simulada e o Mean Pupil Power do tomógrafo Sirius®. Por outro lado, ao calcularmos a média da ceratectomia manual pós-operatória com o Mean Pupil Power pós-operatório (valor denominado Kpop média 1) e compará-la com a ceratectomia pelo método da história clínica, não foram observadas diferenças estatisticamente significantes nos pacientes miopes. Da mesma forma, ao calcular a média da ceratectomia pós-operatória simulada do equipamento Sirius® com o Mean Pupil Power pósoperatório (valor denominado Kpop média 2) e comparála com a ceratectomia derivada do método de história clínica, não foram observadas diferenças estatisticamente significantes nos pacientes miopes. Por outro lado, em olhos hipermetrópicos e com astigmatismo mixto, as médias de erros do Mean Pupil Power pós-operatório, em relação à ceratectomia derivada pelo método da história clínica, não foram significativamente diferentes dos erros na comparação do Kpop média 1 y la Kpop média 2 com a ceratectomia derivada pelo método da história clínica. Conclusões. Nos olhos míopes, as determinações de potência corneana pósoperatória com Kpop média 1 e Kpop média 2 estão mais próximas da ceratectomia derivada pelo método da história clínica do que das medidas de ceratectomia manual média pós-operatória, da ceratectomia simulada pós-operatória ou Mean Pupil Power do equipamento Sirius®. [Jaramillo LC, Galvis V, Tello A, Camacho PA, Castillo A, Pareja LA. Determinação da potência corneana com uma topografia de córnea após cirurgia refrativa com excimer láser. MedUNAB. 2018;21(1):16-30. doi:1029375/01237047.2397].

Mycosis Fungoides Responsive to Oral Alitretinoin and Ultraviolet B Phototherapy: A Case Report / 대한피부과학회지

Mycosis fungoides is the most common type of cutaneous T-cell lymphoma. Patients with early stage disease usually respond well to conventional therapies, with a relatively favorable prognosis. However, a few patients are refractory to treatment and need alternative strategies, even at the patch and plaque stages. We report the case of a middle-aged woman with long-standing and refractory mycosis fungoides that responded to combination therapy with the 308-nm excimer laser and oral alitretinoin.