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: […]

PURPOSE: Observe the effects of corneal intrastromal injection of biguanide at 0.02%, 0.1% and 0.5% in rabbits’ eyes. METHODS: Doble blind prospective study. 8 rabbits were used, randomly identified and divided into 4 groups, with 2 rabbits each, with the administration of 0.2 ml of the drug via intrastromal, in the right eye. The first group received biguanide at a concentration of 0.02%, the second one at 0.1%, the third at 0.5% and the fourth group (control) was given a […]

OBJECTIVE: Accurate intraocular lens power calculation may be a challenging issue in eyes with previous corneal refractive surgery. METHODS: The authors present a series of 8 eyes (4 previously submitted to hyperopic laser in situ keratomileusis and 4 to radial keratectomy) submitted to phacoemulsification and implantation of pseudoaccommodating bifocal intraocular lens. Double-K SRK/T formula has been used. RESULTS: Acceptable refractive visual outcomes have been achieved. CONCLUSION: Pseudoaccommodating bifocal intraocular lenses can be safely implanted in patients with previous corneal refractive […]

OBJETIVO: O cálculo preciso do poder da lente intraocular em olhos com cirurgia refrativa prévia é, por vezes, desafiador. MÉTODOS: Os autores apresentam uma série de casos totalizando 8 olhos (4 previamente submetidos a “laser in situ keratomileusis” hipermetrópico e 4 à ceratotomia radial) submetidos à facoemulsificação com implante de lente intraocular pseudoacomodativa bifocal. Foi empregada a fórmula “double-K” SRK/T para esses casos. RESULTADOS: Resultados refracionais satisfatórios foram obtidos. CONCLUSÃO: Lentes intraoculares bifocais pseudoacomodativas podem ser implantadas com boa previsibilidade […]

PURPOSE: To evaluate central corneal thickness (CCT) in phakic children (controls) and in those with cataracts, pseudophakia and aphakia. Study prospective, observational METHODS: Central corneal thickness was measured in 94 eyes of 47 children. Subjects with Down Syndrome, aniridia, Marfan Syndrome, glaucoma, anterior segment abnormalities or intraocular pressure over 30 mmHg were excluded. Groups were compared for controls and for eyes with pediatric cataracts, pseudophakia and aphakia. RESULTS: Twenty-nine patients were male and eighteen female and the mean age was […]