AIM:To observe the relationship between the retinopothy of prematurity(ROP) and extrauterine growth·METHODS: From January 2010 to October 2010,all premature infants born in Suzhou Municipal Hospital with body weight less than 1500g or gestation age less than 34 weeks were enrolled and underwent ophthalmologic examination.According to infants’ weight deviation percentage of the first five weeks,the infants were divided into three groups.Incidence of ROP in each group were calculated to evaluate its correlation with the weight increase percentage·RESULTS:The greater weight deviation of first five weeks,the greater proportion of ROP positive cases·CONCLUSION: Extrauterine growth of prematurity is closely related to ROP incidence.Measurement of extrauterine growth,especially weight increase,perhaps become a new economic and simple method of early screening,and may provide a theoretical basis for early intervention of ROP.