早产儿(或未熟儿)指不论出生体重大小,胎龄未满37周(小于259天)的新生儿,其发生的比例大约占所有新生儿的7%左右。随着产科和新生儿重症监护治疗技术的发展,早产儿的存活率不断提高,早产儿各器官及系统的并发症和生长迟缓等的发生率也相应增加。早产儿视觉系统的各个部分也有明显的异常,其中最常 Premature (or infancy) refers to newborns whose gestational age is less than 37 weeks (less than 259 days), regardless of birth weight, and accounts for about 7% of all newborns. With the development of obstetric and neonatal intensive care and treatment technologies, the survival rate of premature babies has been continuously increased, and the incidence of complications and growth retardation of various organs and systems in premature babies has also been correspondingly increased. There are also obvious abnormalities in various parts of the prenatal visual system, the most common of these