Ranibizumab injection and laser photocoagulation to treat type 1 retinopathy of prematurity after 40 weeks post menstrual age: a retrospective case series study.

Preterm infants with type 1 ROP at > 40 weeks PMA displayed enhanced fibrotic proliferation. Both primary IVR and laser effectively promote ROP regression. Primary IVR cannot guarantee full retinal vascularization but is associated with a risk of fibrotic contraction.