低视力视力表在设计上吸收了国外的技术,结合我国低视力康复工作现状,低视力者的视觉特点及国人所能接受的“E”字视标,设计了低视力视力表,并获国家专利。该表分标准检查距离为5m及2m两种类型,其原理及各种参数设计依据国家标准GB-1533-89。见图1、图2,是中国的LogMAR(CHINALo Low visual acuity chart in the design of the absorption of foreign technology, combined with the status quo of low vision rehabilitation in our country, the visual characteristics of people with low vision and people can accept the “E” visual target, designed low vision acuity chart, and by the state patent. The table sub-standard inspection distance of 5m and 2m two types, the principle and various parameters of the design based on national standards GB-1533-89. See Figure 1, Figure 2, is China’s LogMAR (CHINALo