A comparison study of corneal topographic changes following 20-, 23-, and 25-G pars plana vitrectomy.

Purpose: To evaluate and compare corneal topographic changes following pars plana vitrectomy with the 23-gauge (G) and 25-G transconjuntival sutureless vitrectomy system as well as the standard 20-G vitrectomy system.

Methods: We prospectively evaluated corneal topographic changes in 45 eyes of 45 patients divided into three groups according to vitrectomy system used (20-, 23-, and 25-G). All patients underwent computer-assisted videokeratography using an EyeSys System 3000 topographer preoperatively and at one week, one month, and three months postoperatively.

Congenital simple hamartoma of the retinal pigment epithelium: a case report.

We report the case of a 56-year-old woman who presented for a routine ophthalmological examination without visual symptoms and had a unilateral black retinal lesion that was detected by clinical examination. Fluorescein angiography and optical coherence tomography findings were compatible with a congenital simple hamartoma of the retinal pigment epithelium. It is very important to detect this tumor and differentiate it from other pigmented fundus lesions that can compromise visual function or result in systemic conditions such as those caused by malignant tumors.

Subretinal fibrosis in Stargardt's disease: case report.

The authors describe the clinical characteristics of a 14-year-old female patient with ophthalmoscopic and angiographic aspects of Stargardt's disease in both eyes who developed subretinal fibrosis and localized retinal pigment epithelial hyperplasia in the posterior pole of the right eye 6 months after a mild blunt trauma to the right globe. The left fundus remains with the typical presentation of Stargardt's disease. Our findings support the theory that ocular trauma occurring in patients with Stargardt's disease can precipitate a sequence of events leading to the development of subretinal fibrosis and significant visual loss.