Abstract

目的 研究快速序列视觉呈现方式(rapid serial visual presentation,RSVP)阅读状态下进展性近视、稳定性近视和正视之间调节反应的差异,探讨调节因素在近视发生、发展过程中的表达.方法 45例受试者参加本实验,分为进展性近视、稳定性近视和正视组,各15例.阅读材料为位于距受试者左眼角膜平面25 cm处的电脑显示屏上的一篇中文短文,通过RSVP软件呈现单个字符,字体大小为9 pt,文字呈现速度为150字/min.使用SEIKO-WV500自动验光仪测量其开放视野阅读状态下左眼的调节反应.结果 所有受试者在4 D的调节刺激下,均存在一定程度的调节滞后,个体差异较大.进展性近视组的调节反应低于正视组[(2.32±0.43)D vs(3.19±0.53)D,P<0.01],进展性近视组的调节反应亦低于稳定性近视组[(2.32±0.43)D vs(3.07±0.34)D,P<0.01],而正视组和稳定性近视组差异无显著性(P=0.441).结论 近距离阅读状态下进展性近视有较高的调节滞后,远视性离焦造成的模糊斑可能是近视的发生发展的促成因素,随着近视发展的稳定,调节反应恢复至一般水平。

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