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 […]

The cornea has a great influence in the visual process. However, it is liable to distortion, such as flattening. When this flattening is caused by the use of contact lenses, we call “corneal warpage”. In this case, some symptoms may occur as blurred vision with glasses, conjunctival hyperemia, foreign body sensation, etc… Used to think that the cornea was more rigid and, in time, realized that the cornea has viscoelastic properties. We can say that the cornea has a body […]

PURPOSE: To evaluate the alterations that occur on the cornea sensitivity after Lasik and PRK surgery. METHODS: Prospective studies have evaluated60 eyes from 30 patients subjected simultaneously to bilateral Lasik and 30 eyes from 15 patients subjected simultaneously to bilateral PRK. According to the amount of inner operatory ablation the eyes were divided into two groups: Group I (< 40 µm) and group II (> 40µm). The cornea sensitivity was measured in the central region of the cornea on the […]

PURPOSE: To describe our experience with crosslinking after Ferrara ring implant for better vision and corneal stabilization. METHODS: six patients with age of 26 – 38 years old had treatment with crosslinking after Ferrara ring implant. Five patients had 2 ring segments implanted and one patient had one segment implanted. After 4 to 55 months the patients were submitted to crosslinking with UVA light according to Seiler et al protocol. RESULTS: Four eyes had progressive alteration of refraction and 2 […]

Report of a study of a family with a remarkable combination of endothelial corneal dystrophy, and anterior chamber dysgenesis classified as Axenfeld-Rieger anomaly. A 56 year-old female had blurred vision complaints. A slit lamp evaluation showed a bilateral posterior embryotoxon and guttata with corneal edema, Descemet membrane’s folds, characterizing Fuchs endothelial dystrophy. A 27 year-old daughter was asymptomatic. The biomicroscopic exam disclosed a bilateral nasal and temporal posterior embryotoxon and a central guttata. Gonioscopy showed iridocorneal strands with a prominent […]