PURPOSE: To verify the morning to evening variations of refraction, visual acuity, intraocular pressure and biomechanical parameters on patients operated by radial keratotomy who presented for refractive re-treatments; and to correlate the biomechanical parameters with refraction, visual acuity and their variations among morning and evening. METHODS: 19 patients were examined, respectively thirty-eight eyes in the morning (9 am) and evening (6 pm), recording sphere-cylindrical dynamic refraction, visual acuity (logMAR) without correction (AVsc) and corrected (AVcc) and ORA (Ocular Response Analyzer) […]

PURPOSE: Measure of efficacy and the security of intraoperative of mitomycin C (MMC) in the pterygium surgery. METHODS: Realized prospective analysis of 102 patients (204 eyes) divided in two groups submitted intraoperative MMC 0.02 % for 2 minutes or saline solution 0.9%. The patients were available in 1º, 7 º, 21º, 30º, 60º and 90º days of postoperative. RESULTS: The pterygium was more prevalence in females (58,33%). The age various 33 to 69 years. The recidive (9) was in the […]

Case report of a patient, with a thick cornea, for Fuchs dystrophy in its early stages, yet with preserved corneal transparency (subclinical corneal edema), associated with normal intraocular pressure (IOP) by Goldman applanation tonometry (GAT), which was however, the diagnosis of primary open-angle glaucoma on the basis of structural changes of the optic nerve. The tomographic study showed a pattern of spatial pachymetry compatible with subclinical edema. The corneal biomechanical study with ORA (Ocular Response Analyzer, Reichert ®) associated with […]

OBJECTIVE: To verify possible correlations between the biomechanical state of the cornea before surgery and the results of stromal ring segments implant for keratoconus. METHODS: Nineteen eyes of 19 patients with keratoconus were evaluated before and 12 months after stromal ring segment implant surgery. The implant of one or two Ferrara ring segments was performed accordingly to the nomogram, considering corneal thickness, ectasy pattern on topography and astigmatism. The Wilcoxon test was performed to verify the differences between visual acuity […]

PURPOSE: To assess the repeatability of central corneal thickness measurement at the geometrical center (Central Corneal Thickness – CCT) given by the Pentacam High Resolution (HR) Comprehensive Eye Scanner (Oculus, Wetzlar, Germany) over time. METHODS: Prospective, single center, observational study. Two separate CCT measurements were taken by the Pentacam corneal tomography exam (CTm) 3 to 12 months apart, and compared. RESULTS: One hundred and sixteen eyes (n=116) of 62 health patients were included in this study. Average CCT in first […]

OBJETIVO: Avaliar a reprodutibilidade da medida da espessura corneana central, no seu centro geométrico, com medidas obtidas pelo sistema Pentacam de Alta Resolução (HR) com o decorrer do tempo. MÉTODOS: Realizado estudo observacional prospectivo em Centro Oftalmológico. Duas medidas isoladas da espessura central da córnea (ECC) foram realizadas com exame de tomografia do segmento anterior Pentacam HR em períodos com intervalos maiores que 3 e em até 12 meses, sendo então comparadas os resultados. RESULTADOS: Cento e dezesseis olhos (n […]

PURPOSE: To correlate optic disc size geometry, corneal architecture and biomechanics. METHODS: Optic disc area and geometry was accessed by HRT III (Heidelberg Retina Tomography – Heidelberg eng), Pentacam (Oculus) was used for accessing IOP and corneal parameters and ORA (Ocular Response Analyze – Reichert) was utilized to access corneal biomechanical properties. Classification based DDLS (Disc Damage Likelihood Scale) scale from retinography was performed. Settings: Instituto de Olhos Renato Ambrósio. RESULTS: 244 eyes of 122 patients (75 female) were included. […]

PURPOSE: To evaluate the IOPg (gold standard, Goldmann correlated Intraocular pressure) and IOPcc (corneal compensated Intraocular pressure) in patients prior to and following phacoemulsification with intraocular lens implantation METHODS: This is a prospective study. Thirty six consecutive patients (47 eyes) that underwent phacoemulsification surgery and intraocular lens implantation were enrolled. Full ophthalmologic clinical assessment including Ocular Response Analyzer (ORA, Reichert Ophthalmic Instruments, Buffalo, NY, USA) measurements were performed in all cases prior to surgery (Pre) and at follow-up time points: […]