Clinical Outcome Following Reinjection of Ranibizumab in Recurrent Cases With Retinopathy of Prematurity

Retinopathy of prematurity was diagnosed and classified according to the International Classification of ROP. Data of the patients who received IVR for type 1 ROP or aggressive posterior ROP (AP-ROP) according to early treatment ROP study (ETROP) were collected. Intravitreal ranibizumab injection was performed as follows; topical anesthetic drop was applied, standard aseptic eye preparation with 5% betadine was performed, a lid speculum was inserted and intravitreal injection of 0.25 mg/0.025 ml ranibizumab with a 30-gauge needle 1.5mm from limbus was given. In case of bilateral ROP, both eyes are injected in the same session. Infants were examined a day after the procedure and weekly thereafter until full vascularization of the retina was observed.

ROP reactivation was defined as any of the following: recurrent plus disease, recurrent neovascularization, or reformation of ridge despite treatment . Once recurrence was determined, second injection of IVR (0.25mg/0.025mL) was given to patients or surgery was performed if progressed to stage 4 or 5. All treated infants were examined until complete regression of ROP and full retinal vascularization.