视敏度测试结果受多种因素影响,视物照度(或亮度)只是其中一个因素,视物周围照度、被测试者所处环境照度以及视物与背景亮度对比对视敏度的影响也很重要。然而目前在进行视敏度筛选时,各家掌握视标照度并末完全统一,对环境条件注意也不够。为了进一步强调视敏度测试结果是受多种因索的影响,笔者以13 Visual acuity test results by a variety of factors, depending on the material illumination (or brightness) is only one of the factors, depending on the surrounding illumination, the subject is located in the ambient illumination and visual and background brightness contrast on the visual acuity is also very important. However, at present, when performing visual acuity screening, each of them masters the standard illuminance of the optotypes and does not completely unify the environment at the same time. In order to further emphasize the visual acuity test results are affected by many factors, the author of 13