SAMIR JACOB BECHARA
Projetos de Pesquisa
Unidades Organizacionais
LIM/33 - Laboratório de Oftalmologia, Hospital das Clínicas, Faculdade de Medicina
2 resultados
Resultados de Busca
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- Intraocular straylight before and after low myopic photorefractive keratectomy with and without mitomycin C(2016) TORRICELLI, Andre Augusto Miranda; PAREDE, Tais Renata Ribeiro; NETTO, Marcelo Vieira; CRESTANA, Francisco Penteado; BECHARA, Samir JacobPurpose: To evaluate ocular straylight before and after photorefractive keratectomy (PRK) for low myopia with and without topical mitomycin (MMC) treatment. Methods: Patients who underwent PRK for low myopia were enrolled into the study. PRK without MMC was performed in 21 eyes (12 patients), whereas PRK with topical 0.02% MMC was performed in 25 eyes (14 patients). Both groups were treated using the NIDEK EC5000 excimer laser. Measurements were performed using the C-Quant straylight meter preoperatively and at two and four months postoperatively. Results: The mean patient age was 30 +/- 4 years, and the mean spherical equivalent refractive error was -2.2 +/- 0.75 D. The mean preoperative intraocular straylight values were 1.07 +/- 0.10 in the PRK without MMC group and 1.07 +/- 0.11 log(s) in the PRK with topical MMC group. At two months after surgery, there was a decrease in mean intraocular straylight values in both groups. However, a significant difference was only reached in the PRK with MMC group [0.98 +/- 0.09 log(s), p=0.002] compared with preoperative values, which was likely due to a greater scatter of measurements in the PRK without MMC group [1.03 +/- 0.13 log(s), p=0.082]. At four months postoperatively, ocular straylight values were not significantly different compared with those at baseline in either the PRK without MMC group [1.02 +/- 0.14 log(s), p=0.26] or in the PRK with topical MMC group [1.02 +/- 0.11 log(s), p=0.13]. Conclusion: PRK for low myopia decreases ocular straylight, and MMC application further reduces straylight in the early postoperative period. However, ocular straylight values do not significantly differ at four months after surgery compared with those at baseline.
- Epi-LASIK e PRK: um ano de estudo comparativo em olhos contralaterais(2013) CRESTANA, Francisco Penteado; BECHARA, Samir Jacob; BLASBALG, Fabiana Tambasco; NETTO, Marcelo Vieira; MUKAI, AdrianaObjective: Compare PRK and Epi-LASIK techniques regarding postoperative visual recovery and symptoms. Methods: Interventional case series study including 38 eyes of 19 patients with myopia up to 5DE and astigmatism up to 1DC. Study included patients with similar refractive errors to be submitted to PRK in one eye and Epi-LASIK in the fellow eye at the same time. Follow-up was 1 year and included refractive error analysis and postoperative discomfort. Results: During the first 12 hours after surgery, 79% (P=0,0003) of patients reported more pain and discomfort in the eye submitted to Epi-LASIK. Twenty-four hours after surgery 63,2% (P=0,012) of patients still referred more pain in the eye submitted to Epi-LASIK and only 10,5% in the contralateral eye. Uncorrected visual acuity was better on the PRK group at the 1(th) day (p=0.034). No difference was observed at the other postoperative days after surgery. Postoperative corneal haze 0,5 (Fantes) was observed in three eyes of the PRK group and in two days of the Epi-LASIK group. Conclusion: Both groups presented good visual refractive results, but the Epi-LASIK group presented more discomfort immediately after surgery.