ETDRS对数视力表
ETDRS logMAR visual acuity chart
Psychometric视力表
psychometric visual acuity chart
标准对数E字视力表
standard logarithmic visual acuity chart E
标准对数视力表
standard logarithmic visual acuity chart
Standard logarithm visual acuity chart
标准视力表
standardized visual acuity chart