Tolerance of porcine eyes to epiretinal prostheses implantation

Abstract

was achieved during the follow-up (p < 0.05). Informations regarding VA, IOP, anterior chamber reaction and vitreous haze are summarized in Table 2. No case required conversion to 20-gauge instrumentation nor suture placement. Three patients who were left with fluid in the vitreous cavity developed hypotony in the first postoperative day, one of them with peripheral choroidal detachment; all cases had spontaneous resolution during the first postoperative month. One patient had a relapse of the toxoplasmic retinochoroiditis 2 months after surgery and was successfully treated with trimethoprim ⁄ sulfamethoxazole associated with prednisone, regaining the VA of the last visit before the recurrence. Six of seven phakic eyes developed cataract during the followup and underwent uneventful phacoemulsification. Bosch-Driessen et al. reported retinochoroiditis reactivation in 36% of the patients within 4 months of cataract surgery, a higher rate than the one found in our series. However, antiparasitic prophylactic treatment should be considered for individuals with history of frequent and severe recurrences and those at great risk of vision loss (Bosch-Driessen et al. 2002). In patients with residual vitreous opacities because of OT, 25-gauge PPV showed to be a feasible technique, with low postoperative inflammatory response and relapse rate, promoting vitreous clearance and VA improvement in all studied patients without any major complication.