purpose: to compare repeated intravitreal injections of bevacizumab (ivb) with triamcinolone acetonide (ivt) for treatment of acute branch retinal vein occlusion (brvo). methods: this randomized clinical trial included, 86 eyes with recent onset (less than 12 weeks) brvo. participants were randomly assigned to two treatment groups: the ivb group (43 eyes) consisted of patients who received mont...

purpose: to investigate aqueous humor nitric oxide (no) levels in patients with branch retinal vein occlusion (brvo) and central retinal vein occlusion (crvo) and to compare these with age-matched controls. methods: eight consecutive patients with brvo and 16 patients with crvo were included in this study. aqueous humor specimens were obtained within 21 days of diagnosis. samples of aqueous hum...

background and purpose: occular toxicity is one of the most important complications of hydroxychloroquine. not any type of treatment has so far been found and recommended for this disorder. the purpose of this study was to report some characteristics of patients with hydroxychloroquine induced retinopathy.    materials and methods: from 107 patients with rheumatoid arthritis (ra) and/or systemi...

bacteriorhodopsin operates as a light/proton transfer pump which converts the light energy into a proton gradient. energy stored in the proton gradient can be used in a variety of ways. bacteriorhodopsin producing sources are some halobacterium species such as halobacterium sodomense and halobacterium salinarum which continue to grow in harsh and salt-saturated conditions. two types of red pigm...

purpose: to compare the safety, efficacy, and visual results of laser in situ keratomileusis (lasik) in eyes with and without previous scleral buckling surgery in the same individuals. methods: in a prospective clinical trial, 14 eyes of 7 patients with myopic refractive error and history of scleral buckling in one eye, underwent lasik surgery in both eyes according to a standard surgical proto...

retinal detachment surgery has been considered an inpatient hospital procedure requiring preoperative and postoperative hospitalization. in this pilot study, outpatient retinal detachment surgery was performed on sixteen patients and the results (100% success rate after an average follow-up of 8.3 months) were comparable or better than reported overall success rates for retinal detachment in th...

A simple mathematical model of steady state  oxygen distribution subject to diffusive transport and non- linear uptake in a retinal cylinder has been developed. The approximate analytical solution to a reaction- diffusion equation are obtained by using series expansions. The computational results for the scaled variables are presented through graphs. The effect of the important parameters (1) d...