[Incidence of retinopathy of prematurity in mainland of China over the last 20 years].

Retinopathy of prematurity (ROP) is one of the important causes of childhood blindness in China with an increasing trend of affected infants. It gives great burden on both the individuals and the society. With the publishing of guidelines on oxygenation policies by Ministry of Health, the screening of ROP has been gradually performed nation-wide. But the prevalence data of ROP is still confusing. We reviewed literature over the last 20 years about causes of childhood blindness in blind school students and ROP screening. This study could provide preliminary evidence about prevalence of ROP in mainland of China and could be benefit for further prevention and the control of ROP.