ABSTRACT
Resumo Objetivo: Avaliar o astigmatismo induzido pela cirurgia de catarata através da técnica de facoemulsificação (FACO) guiada pelo planejador cirúrgico VERION®, em um serviço oftalmológico do Paraná. Métodos: O estudo tem caráter observacional com avaliação individualizada de prontuários de forma retrospectiva, analisando 37 olhos de 20 pacientes operados de catarata pela técnica de FACO com a utilização do VERION® e implantação de lente não-tórica no Hospital de Olhos de Cascavel - PR no período de maio de 2016 a novembro de 2018. Resultados: Dentro de nossa amostra composta por 37 olhos abordados com assistência do VERION®, 43% dos participantes do estudo (n=16) apresentaram redução do astigmatismo inicial, inclusive com eliminação de graus mais graves de astigmatismo (≥2.5 D). Conclusão: O impacto do VERION® foi significativo uma vez que permitiu a correção do astigmatismo prévio de uma parte da amostragem. Em olhos que ocorreram astigmatismo induzido cirurgicamente essa complicação foi menos relevante clinicamente em comparação com incisões corneanas da técnica convencional.
Abstract Objective: To evaluate the astigmatism induced by cataract surgery through the phacoemulsification (PHACO) technique guided by the VERION® surgical planner, in an ophthalmological service of Paraná. Methods: This is an observational study with retrospective individualized evaluation of medical records, analyzing 37 eyes of 20 patients who underwent cataract surgery using the PHACO technique using VERION® and non-toric intraocular lens implantation at the Hospital de Olhos de Cascavel - PR in May 2016. Results: Within our sample of 37 eyes approached with VERION® assistance, 43% of study participants (n=16) had reduced initial astigmatism, including elimination of more severe degrees of astigmatism (≥2.5 D). Conclusion: The impact of VERION® was significant as it allowed the correction of previous astigmatism of a part of the sample. In eyes that had surgically induced astigmatism, this complication was less clinically relevant compared to conventional technique corneal incisions.
Subject(s)
Humans , Male , Female , Middle Aged , Aged , Aged, 80 and over , Astigmatism/complications , Astigmatism/epidemiology , Cataract Extraction/adverse effects , Phacoemulsification/methods , Surgery, Computer-Assisted , Retrospective Studies , Corneal Topography/methods , Observational StudyABSTRACT
ABSTRACT The authors describe an unusual association between posterior keratoconus and iris atrophy, confirmed by a complete ocular evaluation, scheimpflug imaging and pachymetric curve. A hypothesis for concomitant findings is discussed.
RESUMO Os autores descrevem a rara associação entre ceratocone posterior e atrofia de íris, confirmada por avaliação oftalmológica completa, imagens de scheimpflug e curva paquimétrica. Sugere-se uma hipótese que explique a concomitância de ambas as alterações.
Subject(s)
Humans , Female , Middle Aged , Iris/pathology , Iris Diseases/complications , Keratoconus/complications , Astigmatism/complications , Astigmatism/pathology , Atrophy , Amblyopia/complications , Amblyopia/pathology , Corneal Topography/methods , Corneal Pachymetry/methods , Keratoconus/pathologyABSTRACT
ABSTRACT Purpose: To report the visual rehabilitation outcomes and complications of patients fitted with mini-scleral rigid gas-permeable (RGP) contact lenses (mini-SCLs) after penetrating keratoplasty. Methods: We retrospectively reviewed 27 eyes (21 patients) that were fitted with mini-SCLs between October 2013 and December 2014. We analyzed demographic data, previous corneal disorders, visual outcomes, interval from keratoplasty to contact lens fitting, topographic and specular microscope data, fitted contact lens parameters, and complications. The patients were divided into two groups according to the elapsed time since surgery: Group A, grafts with <10 years (n=14 eyes); and Group B, grafts with ≥10 years (n=13 eyes). Results: Lens use was discontinued in four eyes, and microbial keratitis developed in one eye during follow-up. No corneal graft rejection was observed. The mean interval between grafting and initial contact lens fitting was 10.6 ± 7.3 years (range: 1-29 years). The most frequent reason for keratoplasty was keratoconus (22 eyes, 81.4%). The mean contact lens-corrected visual acuity (CLCVA) was 0.09 ± 0.12 logMar (range: 0.50-0.00 logMar). The average topographic astigmatism, mean steepest keratometry (Kmax), and average cellularity on specular microscopy were 6.19 ± 3.49 diopters (D), 58.4 ± 7.8 D, and 1,231 ± 723 cells/mm2, respectively. Conclusions: Mini-SCL use allowed successful visual rehabilitation after corneal keratoplasty, particularly in patients who required corrective lenses for low visual acuity and were unable to wear RGP contact lenses. Our results indicate that mini-scleral lenses may be an option for the treatment of corneal irregularities, such as those associated with keratoplasty.
RESUMO Objetivos: Avaliar a reabilitação visual e complicações com o uso de lentes de contato rígidas gás-permeáveis mini-esclerais em pacientes submetidos ao transplante penetrante de córnea. Métodos: Estudo retrospectivo de 27 olhos (21 pacientes) adaptados com lentes de contato mini-esclerais entre outubro de 2013 e dezembro de 2014. Informações demográficas, doença corneana prévia, acuidade visual, tempo decorrido entre transplante e adaptação da lente, dados topográficos e de microscopia especular, parâmetros da lente de contato adaptada e complicações foram analisadas. Os pacientes foram divididos em dois grupos, levando em consideração o tempo decorrido do transplante de córnea: menos de 10 anos (Grupo A, n=14 olhos) e mais de 10 anos (Grupo B, n=13 olhos). Resultados: Quatro olhos desistiram do uso da lente de contato e 1 paciente apresentou quadro de ceratite infecciosa durante o período de acompanhamento. Não ocorreu episódio de rejeição de botão corneano transplantado durante o período avaliado. O tempo médio entre o transplante e a adaptação da lente de contato foi de 10,6 ± 7,3 anos (variação de 1 a 29 anos) e a causa mais frequente de ceratoplastia foi ceratocone (22 olhos, 81,4%). A acuidade visual média corrigida com lente de contato foi de 0,09 ± 0,12 logMar (variação de 0,50 a 0.00 logMar). O astigmatismo topográfico médio foi de 6,19 ± 3,49 dioptrias (D), a ceratometria média mais curva (Kmax) foi 58,4 ± 7,8 D e a celularidade média na microscopia especular foi 1.231 ± 723 células/mm2. Conclusões: Este estudo retrospectivo mostra o sucesso da adaptação de lentes de contato mini-esclerais na reabilitação visual após o transplante de córnea, especialmente em pacientes com baixa acuidade visual com óculos e intolerância ao uso de lentes de contato rígidas gás-permeáveis. Nossos resultados demonstram que as lentes de contato mini-esclerais são um opção para córneas com irregularidades corneanas, assim como aquelas após o transplante de córnea.
Subject(s)
Humans , Female , Adolescent , Adult , Middle Aged , Aged , Astigmatism/surgery , Keratoplasty, Penetrating/rehabilitation , Contact Lenses/adverse effects , Keratitis/rehabilitation , Keratoconus/surgery , Postoperative Complications , Astigmatism/complications , Time Factors , Visual Acuity , Retrospective Studies , Keratoplasty, Penetrating/adverse effects , Treatment OutcomeABSTRACT
PURPOSE: The purpose of this multi-institute, single-group clinical trial was to evaluate the effectiveness and safety of toric orthokeratology lenses for the treatment of patients with combined myopia and astigmatism. METHODS: A total of 44 patients were included in this clinical trial. The patients ranged in age from 7 to 49 years, with myopia of -0.75 to -6.0 diopters (D) and astigmatism of 1.25 to 4.0 D. After excluding 21 subjects, 23 subjects (39 eyes) were analyzed after toric orthokeratology lens use. The subjects underwent ophthalmologic examination after 1 day and 1, 2, 3, and 4 weeks of wearing overnight toric orthokeratology lenses. RESULTS: A total of 19 subjects (31 eyes) completed the trial after five subjects (eight eyes) dropped out. In the patients who completed the study by wearing lenses for 4 weeks, the myopic refractive error decreased significantly by 2.60 ± 2.21 D (p < 0.001), from -3.65 ± 1.62 to -1.05 ± 1.64 D. The astigmatic refractive error were also significantly decreased by 0.63 ± 0.98 D (p = 0.001), from 2.07 ± 0.83 to 1.44 ± 0.99 D. The mean uncorrected and corrected visual acuities before wearing the lenses were 2.14 ± 0.80 logarithm of the logMAR (logMAR) and 0.05 ± 0.13 logMAR, respectively, which changed to 0.12 ± 0.30 logarithm of the logMAR (p < 0.001) and 0.01 ± 0.04 logMAR (p = 0.156) after 4 weeks. No serious adverse reactions were reported during the clinical trial. CONCLUSIONS: Our results suggest that toric orthokeratology is an effective and safe treatment for correcting visual acuity in patients with combined myopia and astigmatism.
Subject(s)
Adolescent , Adult , Child , Female , Humans , Male , Middle Aged , Young Adult , Astigmatism/complications , Cornea/diagnostic imaging , Myopia/complications , Orthokeratologic Procedures/methods , Slit Lamp Microscopy , Treatment Outcome , Visual AcuityABSTRACT
Purpose: To assess the postoperative outcomes of a novel toric multifocal in traocular lens (IOL) in patients with cataract and corneal astigmatism. Methods: This prospective nonrandomized study included patients with cataract, corneal astigmatism, and a motivation for spectacle independence. In all patients, a Rayner M-flex® T toric IOL was implanted in the capsular bag. Three months after surgery, the distance, intermediate, and near visual acuities; spherical equivalent; residual refractive astigmatism; defocus curve; and contrast sensitivity were evaluated. A patient satisfaction and visual phenomena questionnaire was administered to all patients. Results: Thirty-four eyes of 18 patients were included in this study. Three months after surgery, the mean corrected distance visual acuity (logMAR) was 0.00 ± 0.08 at 6 m, 0.20 ± 0.09 at 70 cm, and 0.08 ± 0.11 at 40 cm. Uncorrected distance vision acuity was 20/40 or better in 100% eyes. The preoperative mean refractive cylinder (RC) was -2.19 (SD: ± 0.53). After a 3-month follow-up, the average RC was -0.44 D (SD: ± 0.27; p<0.001). Contrast sensitivity levels were high. At the last follow-up, 87.5% patients were spectacle-independent for near, intermediate, and distance vision, and approximately 44% patients reported halos and glare. Conclusion: Toric multifocal IOL implantation in patients with cataract and corneal astigmatism using the Rayner M-flex® T toric IOL was a simple, safe, and accurate option. This technology provides surgeons with a feasible option for meeting patient expectations of an enhanced lifestyle resulting from decreased spectacle dependence. .
Objetivo: Avaliar o resultado pós-operatório de uma nova lente intraocular (LIO) multifocal tórica implantada em pacientes com catarata e astigmatismo corneano. Métodos: Estudo prospectivo não randomizado envolvendo pacientes com catarata, astigmatismo corneano, e motivação para eliminar a dependência dos óculos. Em todos os casos, a lente intraocular tórica Rayner M-flex® T foi implantada dentro do saco capsular. Três meses pós-operatório foram avaliados: acuidade visual para longe, intermediário e perto; equivalente esférico; astigmatismo refracional residual; curva de defocus e sensibilidade ao contraste. Ao final do estudo um questionário referente à satisfação visual foi aplicado. Resultados: Trinta e quatro olhos de 18 pacientes foram incluídos no estudo. Após 3 meses de pós-operatório, a acuidade visual corrigida para longe (logMAR) era de 0,00 ± 0,08 a 6 m, 0,20 ± 0,09 a 70 cm e 0,08 ± 0,11 a 40 cm. A acuidade visual sem correcão foi de 20/40, ou melhor, em 100% dos olhos. A média do cilindro refracional pré-operatório era de -2,19 (DP: ± 0,53). Após o seguimento de 3 meses a média do cilindro refracional era de -0,44 D (DP: ± 0,27) (p<0,001). Os níveis de sensibilidade ao contraste foram elevados. Ao final do seguimento, 87,5% dos pacientes estavam independentes dos óculos para perto, intermediário e para longe, e aproximadamente 44% dos pacientes relatavam halos e glare. Conclusão: O implante de uma lente intraocular multifocal em pacientes com catarata e astigmatismo corneano utilizando a lente intraocular tórica Rayner M-flex® T foi uma opção simples, segura e acurada. Essa nova tecnologia oferece ao cirurgião uma maneira passível de se atingir as expectativas dos pacientes em relação ...
Subject(s)
Aged , Female , Humans , Male , Astigmatism/surgery , Cataract Extraction/methods , Cataract/complications , Lenses, Intraocular , Lens Implantation, Intraocular/methods , Astigmatism/complications , Cataract/physiopathology , Contrast Sensitivity/physiology , Patient Satisfaction , Prospective Studies , Treatment Outcome , Visual Acuity/physiologyABSTRACT
Purpose: To compare the effectiveness of limbal relaxing incisions (LRI) with that of toric intraocular lens (IOL) implantation for the treatment of astigmatism during phacoemulsification using nonvectorial (predictability, safety, and efficacy) and vectorial analyses. Methods: This longitudinal observational case series assessed 62 eyes of 31 consecutive cataract patients with preoperative corneal astigmatism of 0.75-2.50 diopters (D) in both eyes. Patients were randomly assigned to 2 groups: a toric IOL group, which received toric IOLs in both eyes, and an LRI group, which received spherical IOLs associated with LRI placement in both eyes. All patients were evaluated at 1, 3, and 6 months after surgery, when refractive astigmatism analysis was performed using both nonvectorial and Alpins vectorial methods. Outcomes were assessed within each group and compared between groups. Results: The proportion of eyes within ±0.50 D of the intended correction at 3 and 6 months after surgery was 75% and 71.88%, respectively, in the LRI group and 40% and 66.67%, respectively, in the toric IOL group. In the remaining period, the proportion was greater in the toric IOL group. The safety index showed no difference at any time point. The efficacy index at 1 and 3 months after surgery was significantly higher in the toric IOL group (0.43 and 0.44, respectively) than in the LRI group (0.31 and 0.36, respectively). At 6 months after surgery, the status of eyes in the LRI group was as follows: 53.13% were undercorrected, 43.74% achieved the intended correction, and 3.13% were overcorrected. In the toric IOL group, 16.76% eyes were undercorrected, 76.67% achieved the intended correction, and 6.67% were overcorrected. The success rates for astigmatic surgery, astigmatism reduction at the intended axis, and astigmatism corrected were 43%, 62%, and 64%, respectively, in the LRI group and 57%, 81%, and 94%, respectively, in the toric IOL group. Conclusions: ...
Objetivo: Comparar incisões relaxantes limbares (IRL) e lentes intraoculares (LIO) tóricas tanto em termos não-vetoriais (efetividade, segurança e eficácia), quanto vetoriais no tratamento do astigmatismo por ocasião da facoemulsificação. Métodos: Estudo observacional longitudinal (série de casos) no qual foram avaliados 62 olhos de 31 pacientes consecutivos de catarata com astigmatismo corneano pré-operatório entre 0,75 e 2,50 dioptrias (D) para ambos os olhos. Os pacientes foram aleatoriamente distribuídos entre 2 grupos: "1" submetido a implante de lentes intraoculares AcrySof ToricTM em ambos os olhos e "2" com implante bilateral de lentes intraoculares tóricas AcrySof NaturalTM complementada por incisões relaxantes limbares. Todos os pacientes foram reavaliados com 1, 3 e 6 meses de pós-operatório, sendo feitas análises do astigmatismo refracional por métodos não-vetoriais, como pela análise vetorial de Alpins, interessando os resultados dentro de cada grupo e entre os grupos. Resultados: O porcentual de olhos entre ±0,50 D da correção pretendida no grupo incisões relaxantes limbares foi de 75 e 71,88%, respectivamente, em comparação aos 40 e 66,67% do grupo lentes intraoculares tóricas aos 3 e 6 meses de pós-operatório. Nos outros períodos avaliados, os porcentuais foram favoráveis ao grupo lentes intraoculares tóricas. O índice de segurança não demonstrou diferença em nenhum dos períodos. O índice de eficácia foi estatisticamente maior para o grupo lentes intraoculares tórica com 1 e 3 meses de pós-operatório (0,43 e 0,44), em comparação ao grupo incisões relaxantes limbares (0,31 e 0,36). Aos 6 meses, o porcentual de olhos, para o grupo incisões relaxantes limbares, foi: hipocorreção ...
Subject(s)
Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Astigmatism/surgery , Lens Implantation, Intraocular/methods , Phacoemulsification/methods , Astigmatism/complications , Cataract/complications , Follow-Up Studies , Longitudinal Studies , Lens Implantation, Intraocular/adverse effects , Treatment Outcome , Visual AcuityABSTRACT
INTRODUCCIÓN: Las cataratas son la principal causa de ceguera evitable, y su prevalencia aumenta en adultos mayores. Existe un porcentaje considerable de astigmatismo concomitante a cataratas, por lo que corregir ambas patologías en un mismo procedimiento quirúrgico resulta interesante para aumentar la agudeza visual postoperatoria. OBJETIVO: Evaluar la efectividad de la implantación de lentes intraoculares tóricos AcrySof en la corrección de astigmatismo concomitante a cataratas. MATERIALY MÉTODO: Estudio retrospectivo de grupo único cuya muestra son todos los pacientes que presentaban cataratas y astigmatismo corneal, con agudeza visual igual o menor a 0,5 (logMAR) operados mediante facoemulsificación con implante de lentes intraoculares tóricos AcrySof, en el Servicio de Oftalmología del Hospital Carlos Van Buren, entre enero del 2009 y septiembre del 2010, que cumplieran con los criterios de inclusión. Se obtuvo una muestra de 87 ojos de 77 pacientes, a los que se les midieron los parámetros agudeza visual, queratometría y refracción subjetiva preoperatoria y postoperatoria. Los pacientes fueron controlados los días 1, 7 y 30 del postoperatorio. RESULTADOS:El 61,33 por ciento y el 79,31 por ciento de los ojos intervenidos resultaron obtener una agudeza visual sin corrección y con corrección, respectivamente, mayor o igual a 20/40. La mediana del cilindro de la refracción subjetiva disminuyó significativamente después de la cirugía. DISCUSIÓN: La implantación de lentes intraoculares tóricos AcrySof durante la cirugía de facoemulsificación, para la corrección de cataratas, resultó ser un método efectivo para la corrección del astigmatismo concomitante.
INTRODUCTION: Cataracts are the main cause of preventable blindness, and its prevalence increases in older adults. There is a considerable percentage of astigmatism concomitant with cataracts, for this reason correct both conditions in a single surgical procedure is of interest to increase visual acuity postoperatively. OBJECTIVE: To evaluate the effectiveness of AcrySof toric intraocular lense implantation for cataract correction with concomitant astigmatism. MATERIAL AND METHOD: Retrospective study of single group, whose sample was all patients with cataract and corneal astigmatism with visual acuity equal or less than 0.5 (logMAR) operated by phacoemulsification with AcrySof toric IOL implantation, in the Ophthalmology Department of the Hospital Carlos Van Buren, between January 2009 and September 2010, who met the inclusion criteria. From all this resulted 87 eyes of 77 patients, measured visual acuity, keratometry and subjective refraction before and after surgery. RESULTS: Patients were evaluated on days 1, 7 and 30 of postoperatory. 61.33 percent and 79.31 percent of the operated eyes obtained an uncorrected and corrected visual acuity, respectively, greater or equal to 20/40. The median subjective refraction cylinder decreased significantly after surgery. DISCUSSION: AcrySof toric intraocular lense implantation during phacoemulsification surgery for cataract correction proved an effective method for correction of concomitant astigmatism.
Subject(s)
Humans , Male , Female , Aged , Astigmatism/surgery , Cataract Extraction/methods , Phacoemulsification/methods , Lens Implantation, Intraocular/methods , Algorithms , Astigmatism/complications , Cataract/complications , Cornea/surgery , Lenses, Intraocular , Refraction, Ocular , Retrospective Studies , Treatment Outcome , Visual AcuityABSTRACT
Objetivo: Analizar la influencia del astigmatismo en la agudeza visual y el grado de satisfacción del paciente post operado de LIO multifocal en el Instituto Oftalmosalud - sede San Isidro, en el periodo de enero 2011 a Diciembre del 2011. Métodos: Estudio de tipo retrospectivo, longitudinal y comparativo. Conclusión: Pacientes con astigmatismo preoperatorio de 1.5 ó menos dioptrías con implante de lente intraocular multifocal alcanzan una óptima agudeza visual lejana, cercana e intermedia. El promedio de calificación en la visión (sin lentes) de los pacientes post operados de LIO multifocal con astigmatismo preoperatorio mayor de ID en el último control postoperatorio (al mes) fue de 6.87 (DS: 1.56) en una escala del 0 a 10.
Subject(s)
Male , Female , Humans , Middle Aged , Aged , Aged, 80 and over , Visual Acuity , Astigmatism/complications , Lens Implantation, Intraocular , Patient Satisfaction , Longitudinal Studies , Retrospective StudiesABSTRACT
PURPOSE: To evaluate the accuracy of preoperative keratometers used in cataract surgery with toric intraocular lens (IOL). METHODS: Twenty-five eyes received an AcrySof toric IOL implantation. Four different keratometric methods, a manual keratometer, an IOL master, a Pentacam and an auto keratometer, were performed preoperatively in order to evaluate preexisting corneal astigmatism. Differences between the true residual astigmatism and the anticipated residual astigmatism (keratometric error) were compared at one and three months after surgery by using a separate vector analysis to identify the keratometric method that provided the highest accuracy for astigmatism control. RESULTS: The mean keratomeric error was 0.52 diopters (0.17-1.17) for the manual keratometer, 0.62 (0-1.31) for the IOL master, 0.69 (0.08-1.92) for the Pentacam, and 0.59 (0.08-0.94) for the auto keratometer. The manual keratometer was the most accurate, although there was no significant difference between the keratometers (p > 0.05). All of the keratometers achieved an average keratometric error of less than one diopter. CONCLUSIONS: Manual keratometry was the most accurate of the four methods evaluated, although the other techniques were equally satisfactory in determining corneal astigmatism.
Subject(s)
Female , Humans , Male , Analysis of Variance , Astigmatism/complications , Cataract Extraction , Lens Implantation, Intraocular/methods , Lenses, Intraocular , Magnetic Resonance Imaging , Prospective Studies , Refraction, Ocular , Reproducibility of Results , Treatment Outcome , Visual AcuityABSTRACT
PURPOSE: To evaluate the long-term efficacy and rotational stability of the AcrySof toric intraocular lens (IOL) in correcting preoperative astigmatism in cataract patients. METHODS: This prospective observational study included 30 eyes from 24 consecutive patients who underwent implantation of an AcrySof toric IOL with micro-coaxial cataract surgery between May 2008 and September 2008. Outcomes of visual acuity, refractive and keratometric astigmatism, and IOL rotation after 1 day, 1 month, 3 months, and long-term (mean, 13.3+/-5.0 months) follow-up were evaluated. RESULTS: At final follow-up, 73.3% of eyes showed an uncorrected visual acuity of 20/25 or better. The postoperative keratometric value was not different from the preoperative value; mean refractive astigmatism was reduced to -0.28+/-0.38 diopter (D) from -1.28+/-0.48 D. The mean rotation of the toric IOL was 3.45+/-3.39 degrees at final follow-up. One eye (3.3%) exhibited IOL rotation of 10.3 degrees, the remaining eyes (96.7%) had IOL rotation of less than 10 degrees. CONCLUSIONS: Early postoperative and long-term follow-up showed that implantation of the AcrySof toric IOL is an effective, safe, and predictable method for managing corneal astigmatism in cataract patients.
Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Acrylic Resins , Astigmatism/complications , Cataract/complications , Cataract Extraction/methods , Follow-Up Studies , Lenses, Intraocular , Prospective Studies , Prosthesis Design , Refraction, Ocular , Time Factors , Treatment Outcome , Visual AcuityABSTRACT
A 29-year-old woman who underwent laser in situ keratomileusis (LASIK) for myopic astigmatism in both eyes presented with severe pain, photophobia and decreased visual acuity in the left eye eight days after surgery. Examination revealed severe anterior uveitis with fibrinous exudates in the anterior chamber, flap edema and epithelial bullae. Laboratory investigations for uveitis were negative and the patient required systemic and intensive topical steroids with cycloplegics to control the inflammation. This case demonstrates that severe anterior uveitis may develop after LASIK and needs prompt and vigorous management for resolution.
Subject(s)
Administration, Topical , Adult , Anti-Inflammatory Agents/administration & dosage , Astigmatism/complications , Astigmatism/surgery , Cyclopentolate/administration & dosage , Drug Administration Schedule , Exudates and Transudates/metabolism , Female , Humans , Keratomileusis, Laser In Situ/adverse effects , Mydriatics/therapeutic use , Myopia/complications , Myopia/surgery , Prednisolone/administration & dosage , Prednisolone/analogs & derivatives , Steroids/administration & dosage , Uveitis, Anterior/drug therapy , Uveitis, Anterior/etiology , Uveitis, Anterior/metabolism , Uveitis, Anterior/pathologyABSTRACT
OBJECTIVE: To evaluate the change in intraocular pressure (IOP) measurement by Goldmann applanation tonometer after Laser in Situ Keratomileusis (LASIK) for myopia and myopic astigmatism, and to assess the correlation between the changes of lOP reading and the reduction of central corneal thickness (CCT) after LASIK in Thai patients. STUDY DESIGN: Prospective correlational study. MATERIAL AND METHOD: LASIK was performed on 65 eyes of 33 patients for correction of myopia and myopic astigmatism. IOP was measured by Goldmann applanation tonometer before and 3 months after LASIK. The correlation between the change in IOP reading and the change in central corneal thickness were evaluated. RESULTS: IOP reading was significantly reduced by mean of 2.9 +/- 2.5 mmHg (p = 0.0001). The authors used Pearson analysis to study the correlation between the change in IOP and the reduction of CCT. In subgroup analysis the patients were divided by degree of myopia: group 1, myopia less than -3 diopters (D) (n = 14); group 2, myopia -3 to -6 D (n = 31); group 3, myopia greater than -6 D (n = 20)). The result showed more correlation in higher myopia group (Pearson; r = 0.158 in group 3, r = -0.098 in group 2 and r = -0.102 in group 1). CONCLUSION: Goldmann applanation tonometry underestimates the IOP in thin cornea. Variability in CCT is a potent confounder of this tonometry technique. Therefore, it has important implications for considering CCT measurement incorporated with Goldmann applanation tonometry for glaucoma diagnosis especially in myopic patients who undergo LASIK surgery.
Subject(s)
Adolescent , Adult , Astigmatism/complications , Body Weights and Measures , Female , Humans , Intraocular Pressure/physiology , Keratomileusis, Laser In Situ , Male , Myopia/complications , Prospective Studies , Thailand , Tonometry, Ocular/methodsABSTRACT
PURPOSE: To investigate the effects of anisometropia on binocular vision. METHODS: One to three dioptres of unilateral hyperopia, myopia or astigmatism was induced in 30 normal adults. The effect on binocularity was assessed with the Worth-four dot test, Titmus stereo test and Bagolini's lenses. RESULTS: Binocular vision deteriorated with increasing anisometropia. Spherical anisometropia was more deleterious than astigmatic anisometropia. CONCLUSION: In addition to amblyopia, the potential effect of anisometropia on binocular vision should be considered while prescribing spectacles in young children during the sensitive period.
Subject(s)
Adult , Anisometropia/complications , Astigmatism/complications , Depth Perception , Humans , Vision, Binocular , Visual AcuityABSTRACT
PURPOSE: To determine whether pseudophakic astigmatism is a desirable goal, and if so, which one is better: against-the-rule (ATR) or with-the-rule (WTR). METHOD: Eyes were included only if they had an uncorrected vision > or = 6/18 and N/18. Three groups, of 40 patients each were evaluated: group 1, pseudophakes with neutral astigmatism; group 2, with ATR and group 3, with WTR astigmatism Unaided distance and near visual acuity was recorded. Statistical analysis was performed using the chi-square test for independence. RESULTS: Unaided distance vision of > or = 6/7.5 was achieved in 19 eyes (47.5%) of group 1 (neutral), 12 eyes (30%) in group 2 (ATR), and 5 eyes (12.5%) in group 3 (WTR) (p = 0.0133, significant). Unaided near vision of > or = N/9 was achieved in 17 eyes (42.5%) in group 1 (neutral), 34 eyes (85%) in group 2 (ATR), and 10 eyes (25%) in group 3 (WTR) (P < 0.001, significant). Group 1 (neutral) fared the best for unaided distance visual acuity. Group 2 (ATR) was better than in group 3 (WTR) for distant vision. Group 2 (ATR) fared the best for unaided near vision. CONCLUSION: ATR astigmatism could be a desirable goal after cataract extraction in selected populations because the largest proportion of these cases achieved good unaided near vision with acceptable distant vision.
Subject(s)
Astigmatism/complications , Cataract Extraction/adverse effects , Humans , Lens Implantation, Intraocular/adverse effects , Prospective Studies , Pseudophakia/complications , Refraction, Ocular , Visual AcuityABSTRACT
The efficacy, predictability, safety, and short-term stability of excimer laser photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) for treatment of myopia and astigmatism were determined. The preoperative myopia ranged from -1.50 to -15.75 D and the astigmatism was less than 4.0 D. Of the 147 eyes, 73 and 74 underwent PRK and LASIK, respectively. Mean preoperative spherical equivalent refraction (SE) was -3.72 +/- 1.69 D in the PRK group and -7.66 +/- 2.30 D in the LASIK group. Mean postoperative SE at the last examination (3 to 6 months) was -0.13 +/- 0.82 D and -0.38 +/- 1.19 D in the PRK and LASIK groups, respectively. Eighty six percent in the PRK group and 77 per cent in the LASIK group achieved a SE within +/- 1.0 D and the refractions were stable between 1 month and 3-6 months. Uncorrected visual acuity of 20/40 or better was noted in 91 per cent in the PRK group and 97 per cent in the LASIK group. No eyes lost one or more lines of best spectacle-corrected visual acuity in both groups. PRK and LASIK appear to be effective, safe, predictable, and short-term stable in treating myopia and astigmatism. Longer follow-up studies will help evaluate the long-term stability of the procedure and possibility of later complications.
Subject(s)
Adult , Astigmatism/complications , Evaluation Studies as Topic , Female , Follow-Up Studies , Humans , Keratomileusis, Laser In Situ/methods , Lasers, Excimer , Male , Myopia/complications , Photorefractive Keratectomy/methods , Postoperative Complications , Retrospective Studies , Sensitivity and Specificity , Visual AcuitySubject(s)
Humans , Risk Factors , Astigmatism/complications , Factor Analysis, Statistical/analysisABSTRACT
Foram tratados com laser de argônio 4 pacientes com hérnia iriana de longa duraçäo. Em 3 casos obteve-se resultado anatômico satisfatório (75 por cento). Revisa-se e discute-se o argônio como opçäo nos casos com prolapso tardio, recobertos por tecido conjuntival
Subject(s)
Humans , Astigmatism/complications , Astigmatism/surgery , Hernia/therapy , Iris/pathology , Iritis/surgery , Lasers/therapeutic use , Light Coagulation , ProlapseABSTRACT
Transverse incision astigmatic keratotomy procedures were performed, combined with radial keratotomy, in 16 eyes for correction of astigmatism and coexisting myopia. We used a transverse incision technique in which T-incisions vertically intersected radial incisions of the steepest corneal meridian. After a mean follow-up period of 10 months with a range of six to 27 months, an average 1.92 diopters of the cylinder was corrected. In comparison with 2.11 diopters of the cylinder corrected at postoperative one day, there was a 22.8% decrease in the effect of astigmatism correction after a postoperative period averaging 10 months.
Subject(s)
Adolescent , Adult , Female , Humans , Male , Middle Aged , Astigmatism/complications , Follow-Up Studies , Keratotomy, Radial/methods , Myopia/complications , Refraction, Ocular , Visual AcuityABSTRACT
Este estudio se realizó en 88 ojos que presentaban pterigión no recidivante y con invasión corneal de más de 1 mm. Preoperatoriamente se realizó queratometría y medición de la invasión corneal, se efectuó extirpación del pterigión con la técnica de esclera descubierta, y seis meses después se realizó nuevamente queratometría. Se eliminaron 32 ojos, quedando al final del estudio un grupo de 56 ojos en los que se encontraron los siguientes hallazgos: las córneas preoperatoriamente esféricas, en su mayoría (60%) presentaron postoperatoriamente astigmatismo contra la regla (P<0.05), y el astigmatismo preoperatorio con la regla disminuyó en 0.5 D (P<0.05); en ambos casos por aumento de la curvatura corneal en el meridiano horizontal. Los cambios del astigmatismo preoperatorio contra la regla no tuvieron significación estadística (P>0.05)