Home / Standards / GB/T 11533-2011 GB/T 11533-2011 Active Standard for logarithmic visual acuity charts 标准对数视力表 Standard Type GBT ICS 13.100 CCS C56 Status 现行 Issue Date 2011-12-30 Implementation 2012-05-01 Responsible Dept 国家疾控局 Drafting Unit N/A