Fig. 2From: Progression of retinal vascularization after intravitreal anti-vascular-endothelial growth factor therapy in retinopathy of prematurityTime of reactivation in pre-treatment zones 1 and 2 in retinopathy of prematurity (ROP) patients. Most of reactivations occurred in the first 150 days. Reactivation in pre-treatment zone 1 was about twice of pre-treatment zone 2Back to article page