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. Results: In the 20-G vitrectomy group, we found statistically significant postoperative changes in corneal curvature parameters with an average steepening of 0.98 ± 0.18 D (P<0.001) and 0.93 ± 0.21 D (P<0.001) at one week and one month, respectively. No statistically significant difference was observed at the three-month follow-up visit. In the 23-and 25-G groups, no statistically significant changes in corneal curvature parameters were observed at any postoperative follow-up visit. Conclusion: Twenty-three-gauge and 25-gauge transconjunctival sutureless vitrectomy did not induce topographic corneal changes following surgery, whereas 20-G vitrectomy was found to induce transient topographic corneal changes that had returned to preoperative levels at three months postoperatively.

No abstract

We report the case of a 56yearold woman who presented for a routine ophthal mological 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 de tect this tumor and differentiate it from other pigmented fundus lesions that can com promise visual function or result in systemic conditions such as those caused by malignant tumors.

Objetivo: Este estudo tem como objetivo investigar a existência de diferença da espessura corneana central (ECC) em pacientes com glaucoma de pressão normal (GPN), glaucoma crônico simples (GCS) e pacientes normais (Controle O grupo de GPN apresentou uma ECC significativamente menor quando comparado com os grupo controle (p = 0,01) e GCS (p=0,006). Entre os grupos controle e GCS não houve diferença estatística significativa (p = 0,91). Conclusão: Observou-se que numa amostra da população brasileira a ECC dos olhos com GPN é significativamente menor do que a ECC dos pacientes com GCS e do grupo controle. Normal tension glaucoma and central corneal thickness

No abstract