Friendly D S, Jaafar M S, Morillo D L
Children's National Medical Center, Washington, DC 20010.
Am J Ophthalmol. 1990 Sep 15;110(3):293-9. doi: 10.1016/s0002-9394(14)76347-0.
Bailey-Lovie-Ferris visual acuity charts and Teller visual acuity cards were used to compare recognition and grating visual acuity at near testing distances in 32 children with anisometropic amblyopia without strabismus. Appropriate optical corrections were worn. Test-retest intraobserver reliability was higher for letters (r =.95) than for gratings (r = .68). Using 20/30 visual acuity or better as the criterion for normal visual acuity, eight eyes with letter visual acuities ranging from 20/42 to 20/138 would have been inaccurately found to be normal by using the Teller visual acuity cards alone. Grating visual acuity measurements tended to be better than letter visual acuity; and, in general, they did not worsen proportionately with poorer letter visual acuity.
使用贝利-洛维-费里斯视力表和泰勒视力卡片，对32名无斜视的屈光参差性弱视儿童在近测试距离下的识别视力和光栅视力进行比较。所有儿童均佩戴了合适的光学矫正器具。观察者内重测信度方面，字母视力（r = 0.95）高于光栅视力（r = 0.68）。以20/30及以上视力作为正常视力标准，仅使用泰勒视力卡片时，8只字母视力在20/42至20/138之间的眼睛会被错误判定为正常。光栅视力测量结果往往优于字母视力；总体而言，随着字母视力变差，光栅视力并未成比例恶化。
