为探索更好的视力检查工具，笔者试制了一种视力表一标准视力表，经临床检查对比，认为设计较为合理，测试精确，使用方便，报告如下。视标设计原理：采用传统视力表以卜视角为单位，取眼结点为圆心，5m为半径，在该半径的圆弧上以1’视角所对的弦作为标准视力视标的笔划宽度视 In order to explore a better vision inspection tools, the author trial a visual acuity chart a standard eye chart, the clinical examination comparison, that the design is more reasonable, accurate test, easy to use, the report is as follows. As the standard design principle: the traditional acuity chart BU angle as the unit, taking the eye knot as the center, 5m radius, on the radius of the arc 1 ’angle of view of the string as the standard visual acuity stroke width