Three intravitreal bevacizumab versus two intravitreal triamcinolone injections in recent onset central retinal vein occlusion

PurposeTo evaluate the effects of repeated intravitreal injections of bevacizumab (IVB) versus triamcinolone acetonide (IVT) in the treatment of acute central retinal vein occlusion (CRVO). MethodsIn this randomized clinical trial, 86 eyes with recent onset (<12weeks) CRVO were assigned to two groups: IVB group (43 eyes) that received three monthly injections of 1.25mg of IVB, and IVT group (43 eyes) that received two injections of 2mg IVT 2months apart. Outcomes were best-corrected visual acuity (BCVA), central macular thickness (CMT), and intraocular pressure (IOP) changes. ResultsMean BCVA improved significantly at 6months in both groups; from 0.870.49 to 0.41 +/- 0.35 logMAR in IVB group, and from 0.81 +/- 0.45 to 0.62 +/- 0.48 logMAR in IVT group (p<0.001). However, between-group differences reach a significant level at months 4 (p=0.003) and 6 (p<0.001) in favour of the IVB group. In terms of CMT reduction, the difference between the groups was statistically significant (p=0.002) at month 6. Significant differences were noted more in the ischaemic cases in favour of the IVB group. Mean IOP rise was significantly higher in the IVT group at all visits. ConclusionsBoth 3-times monthly IVB injections and 2-times IVT injections could be effective in cases with recent onset CRVO up to 6months. However, considering the better outcomes after IVB injections and the potential complications of IVT injections, we would recommend prescheduled repeated IVB injections for such cases. The observed favourable responses were more pronounced in the ischaemic types; nevertheless, this should be confirmed in larger studies.