Medical Sciences, Mashhad, IR Iran Received: 17/02/08; Revised: 02/12/08; Accepted: 28/12/08 Code Number: pe09009 Abstract Objective: Retinopathy of Prematurity (ROP) is a disease of the eye caused by disorganized growth of retinal blood vessels resulting in scarring and retinal detachment. All preterm babies are at high risk for ROP, and very