验光是明确屈光不正的主要方法 ,在临床工作中占相当大的工作量。以往传统的视网膜检影方法费时费力 ,又极难掌握。 70年代后 ,新型的自动验光仪应运而生 ,采用红外、电子、计算机等一系列先进技术 ,简单、容易掌握 ,完全超出了单纯应用光学的范畴 ,但是 ,由于各种原因 ,自动验 Optometry is a clear method of refractive errors, in clinical work account for a considerable workload. In the past the traditional method of retinoscopy time-consuming and difficult, and extremely difficult to grasp. After the 1970s, a new type of automatic refractor came into being. It is simple and easy to master using a series of advanced technologies such as infrared, electronic and computer. It goes beyond purely application of optics. However, due to various reasons,