ABSTRACT
PURPOSE: To design a model to measure real IOP during lasik in pig eyes. METHODS: A reusable blood pressure transducer was used. Each eye was placed on a stand with sufficient support for the surgical procedure. The globes were inflated with 5% glucosated solution through the optic nerve to attain an IOP of 10-20 mmHg. A 27-gauge catheter was then inserted from the pars plana to the anterior chamber cavity. Real IOP was transmitted via the catheter liquid column to an external sensor. A suction ring was applied and a flap was created. During the procedure, IOP was registered with the ML110 Bridge Amplifier connected to a baro transducer. RESULTS: Values of real IOP were measured in freshly enucleated pig eyes during the lasik procedure. The model was able to instantaneously register the changes in IOP induced by the application of a suction ring and the creation of a flap in the pig eyes with good reproducibility. At the end of the procedure the IOP values remained stable. CONCLUSIONS: We have developed an experimental model to observe the course of suctioning and changes in IOP simultaneously. This model seems to be accurate in obtaining IOP values from the anterior chamber cavity during LASIK.
Subject(s)
Intraocular Pressure , Intraoperative Care , Keratomileusis, Laser In Situ , Animals , Diagnostic Techniques, Ophthalmological , Models, Animal , SwineABSTRACT
PURPOSE: To evaluate LASIK results obtained with the IntraLase femtosecond laser to correct myopia. METHODS: This was a prospective, single masked observer study. Flaps were created with the IntraLase femtosecond laser (FS). All laser procedures were performed by the same surgeon using the Technolas 217 excimer laser (Bausch & Lomb). We have analysed the uncorrected visual acuity (UCVA) at 1 day, 1 week, 1 month and 3 months after surgery and best spectacle-corrected visual acuity (BSCVA) after 3 months. RESULTS: 485 eyes with myopia were treated and their results evaluated. The mean preoperative sphere was of -3.9 D (SD 2.0) and a mean astigmatism of -0.9 D (SD 0.9) with BSCVA 1.1 (SD 0.1). The UCVA results were 0.94 (SD 0.1) at the first day postoperatively visit, 0.96 (SD 0.1) at first week, 1.00 (SD 0.1) at one month and 1.00 (SD 0.2) at 3 months. The refractive error at 3 months was -0.02 D (SD 0.3) and -0.1 D (SD 0.3) of myopia and astigmatism respectively. At 3 months 96.9% of eyes were within +/-1.00D and 93.6% of the eyes were within + 0.50 D. CONCLUSIONS: LASIK to correct myopia is a safe, effective and predictable procedure using IntraLase FS to create the flap.
Subject(s)
Keratomileusis, Laser In Situ/instrumentation , Lasers , Myopia/surgery , Adult , Female , Humans , Keratomileusis, Laser In Situ/adverse effects , Male , Middle Aged , Prospective Studies , Refraction, Ocular , Single-Blind Method , Treatment Outcome , Visual AcuityABSTRACT
PURPOSE: To evaluate the efficacy of long-term versus short-term steroid treatment in preventing regression after hyperopic LASIK. MATERIAL AND METHODS: This is a prospective single masked study. Hyperopic patients who were candidates for LASIK surgery were randomized to be treated with one week (topical dexametasone) in control group or one month (topical dexametasone the first week and topical fluormetalone the next three weeks) in study group. The three month postoperative manifest refraction was compared between the two groups. RESULTS: 105 eyes were included in each group. The mean preoperative spherical equivalent was 3.17 D SD 2.82 D (standard deviation) and 3.39 D SD 2.65 D in the study and control group, respectively (p=0.6). The final manifest refraction in the three-month postoperative visit was 0.62 D SD 0.68 D and 0.6 D SD 0.3 D in the study and control group respectively (p=0.6). CONCLUSIONS: Long-term topical steroid therapy does not appear to improve the refractive result in hyperopic LASIK.
Subject(s)
Dexamethasone/therapeutic use , Glucocorticoids/therapeutic use , Hyperopia/prevention & control , Hyperopia/surgery , Keratomileusis, Laser In Situ/methods , Postoperative Complications/prevention & control , Administration, Topical , Adult , Humans , Middle Aged , Prospective Studies , Single-Blind Method , Treatment OutcomeABSTRACT
Objetivo: Evaluar la eficacia del tratamiento corticoideo tópico prolongado en pacientes operados de LASIK hipermetrópico.Material y métodos: Se realiza un estudio prospectivo observador enmascarado. Pacientes candidatos a cirugía LASIK para la corrección de baja y moderada hipermetropía fueron asignados aleatoriamente a recibir tratamiento tópico corticoideo (dexametasona) una semana (grupo control) o un mes (dexametasona la primera semana y fluorometalona las tres siguientes), en el grupo estudio. Se comparó la refracción final manifiesta en ambos grupos.Resultados: Analizamos 105 ojos en cada grupo (estudio y control). El equivalente esférico medio preoperatorio era 3,17 D DE 2,82 D (desviación estándar) y 3,39 D DE 2,65 D en el grupo estudio y control respectivamente (p=0,6). La refracción final manifiesta a los 3 meses era 0,62 D DE 0,68 D y 0,6 D DE 0,3 D en el grupo estudio y control respectivamente (p=0,6).Conclusión: La regresión refractiva tras LASIK hipermetrópico, no parece ser modulable por el mayor o menor tratamiento corticoideo tópico
Purpose: To evaluate the efficacy of long-term versus short-term steroid treatment in preventing regression after hyperopic LASIK.Material and methods: This is a prospective single masked study. Hyperopic patients who were candidates for LASIK surgery were randomized to be treated with one week (topical dexametasone) in control group or one month (topical dexametasone the first week and topical fluormetalone the next three weeks) in study group.The three month postoperative manifest refraction was compared between the two groups.Results: 105 eyes were included in each group. The mean preoperative spherical equivalent was 3.17 D SD 2.82 D (standard deviation) and 3.39D SD 2.65D in the study and control group, respectively (p=0.6). The final manifest refraction in the three-month postoperative visit was 0.62D SD 0.68D and 0.6D SD 0.3D in the study and control group respectively (p=0.6).Conclusions: Long-term topical steroid therapy does not appear to improve the refractive result in hyperopic LASIK
Subject(s)
Humans , Dexamethasone/therapeutic use , Glucocorticoids/therapeutic use , Hyperopia/prevention & control , Hyperopia/surgery , Keratomileusis, Laser In Situ/methods , Postoperative Complications/prevention & control , Administration, Topical , Case-Control Studies , Prospective Studies , Treatment Outcome , Single-Blind MethodABSTRACT
Caso clínico: Presentamos el caso de un varón de 63 años que refiere la aparición de una lesión rojo anaranjada en la carúncula de su ojo derecho, con un crecimiento progresivo desde hacía seis meses. Se realiza su extirpación quirúrgica y un análisis histológico, llegando al diagnóstico de oncocitoma de carúncula. Discusión: El oncocitoma es un tumor poco frecuente, casi siempre benigno, de células que derivan de epitelios glandulares. Su histogenia y caracteristicas, así como su pronóstico se discuten brevemente (AU)
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