Ebert E M, Fine A M, Markowitz J, Maguire M G, Starr J S, Fine S L
Arch Ophthalmol. 1986 Jul;104(7):1009-12. doi: 10.1001/archopht.1986.01050190067041.
Central visual function is characteristically reported as Snellen acuity at distance and near. We performed functional tests in a group of patients with visual acuity of 20/100 or worse due to macular disease to determine whether there was a relationship between Snellen acuity and functional performance among these patients with poor visual acuity. Our tests of functional performance included currency discrimination, color recognition, reading a clock, and reading large print. Our results suggest that there is a correlation between Snellen acuity and functional vision, even among patients with poor visual acuity. Hence, therapeutic efforts to keep patients' visual acuity at 20/200 rather than 20/400, for example, appears to be justifiable in that better acuity levels seem to be associated with improved functional performance.
中央视觉功能通常以远距离和近距离的斯内伦视力来报告。我们对一组因黄斑疾病导致视力为20/100或更差的患者进行了功能测试，以确定在这些视力不佳的患者中，斯内伦视力与功能表现之间是否存在关联。我们的功能表现测试包括货币辨别、颜色识别、读时钟和阅读大字印刷品。我们的结果表明，即使在视力不佳的患者中，斯内伦视力与功能性视力之间也存在相关性。因此，例如将患者视力保持在20/200而非20/400的治疗努力似乎是合理的，因为更好的视力水平似乎与改善的功能表现相关。
