摘要
目的探讨不同屈光状态下眼的调节近点(near point of accomodation,AN)改变的意义,分析调节近点异常在近视眼发生、发展中的作用,进一步了解眼调节近点变化与近视眼的因果关系.方法对248名(493只眼)近视青少年患者按照年龄和近视度数进行分组,并行屈光状态的检查,采用移近法获得调节近点距离.结果在9~10岁年龄组中,低度和中度近视组AN数值增加.在11~15岁和16~18岁年龄组中,低度近视组AN数值增大,高度近视组AN数值减少.结论高AN数值可能是由于长期视近而造成调节力的滞后或不足引起的,这种滞后或不足可能是诱发近视不断加深的原因之一.可以认为AN远移可能是近视眼发生、发展的前兆.
Objective To investigate near-point accommnodation (AN) under different refractive conditions. To analyze, the relationship between functional AN and myopia onset and development. Methods Two hundred forty-eight young myopia subjects ( 493 eyes) were enrolled and divided into groups according to age and degree of myopia. AN was tested and its relationship to myopia was analyzed. Results ①In the group of nine-to-ten year olds, the AN in low and moderate myopia had increased. ②In the group of eleven-to-fifteen year olds and the sixteen-to-eighteen year olds, the AN in low myopia had increased, but was reduced in high myopia. Conclusion High AN may be a contributing factor in sustained near reading work. A reduced AN may be. an indication of insufficient accommodative ability, which can be a sign of myopia onset.
出处
《眼视光学杂志》
2005年第4期251-252,共2页
Chinese Journal of Optometry & Ophthalmology
关键词
近视/病因学
调节近点
青少年
myopia/etiolocy
near point of accommodation
adolescence