Ophthalmic optics . visual acuity testing . standard optotype and its presentation 眼科光学.视觉敏锐度测验.标准验光字体及其演示
2.
Visual acuity test types - specification for landolt ring optotype for non - clinical purposes 视觉敏锐度测验.非临床用缺口环验光字体规范
3.
Ophthalmic optics - visual acuity testing - standard optotype and its presentation iso 8596 : 1994 ; german version en iso 8596 : 1996 眼科光学.视力检验.标准视力符号及其演示
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