低视力对数视力表的研制

The design of log acuity chart for a low vision

目的 :研制一种适合我国眼科临床使用的低视力对数视力表。方法 :根据Baily Lovie的LogMAR视力表和我国标准对数视力表的设计标准和原理设计 ,1分视角为 1.0视力 ,视标的增率为 10 10 ,视标的间距和行距与我国标准视力表相同 ,E字母设备 ,每行视标个数与Baily Lovie的视力表一致。为了与低视力分级标准一致 ,采用小数记录。结果和结论 :低视力对数视力表 ,设计合理 ,检查低视力的范围大 。

Objective:To provide a visual acuity chart for chinese low vision patients.Methods:The principle of design is same as Baily-Lovie,s LogMAR visual acuity chart and Chinese national standard log visual acuity chart. The vision notation is decimal record in order to comparable with low vision grades.Results and Conclusion:The design of low vision chart is reasonable and test range is between 0.025 and 0.05. It is suitable for eye care in China.