Mayer D L, Fulton A B, Rodier D
Ophthalmology. 1984 Aug;91(8):947-53. doi: 10.1016/s0161-6420(84)34209-9.
Acuities for gratings obtained by preferential looking (PL) that differed from expectations based upon the ophthalmologic examination prompted this study. Older pediatric patients (124 patients; mean age, 6.5 years) were tested by the PL grating test and a test of recognition acuity (pictures or letters). On the average, grating acuity was better than recognition acuity. In patients with dense amblyopia or foveal abnormalities, very large discrepancies between grating and recognition acuities were found. In nonamblyopic patients, acuities were no more discrepant than for children with normal eyes. Amblyopia was less dense by grating acuities than by recognition acuities; grating acuities were sensitive, however, to refractive and organic amblyopia but not to strabismic amblyopia. Possible explanations include the heterogeneity of patients' eye disorders, single vs. linear acuity, stimulus size and relative complexity of stimuli. These results can aid in evaluating PL grating acuities of preverbal patients, and suggest modifications of stimuli to investigate amblyogenesis.
通过优先注视（PL）获得的光栅视力与基于眼科检查的预期不同，这促使了本研究。对年龄较大的儿科患者（124例；平均年龄6.5岁）进行了PL光栅测试和识别视力测试（图片或字母）。平均而言，光栅视力优于识别视力。在患有重度弱视或中央凹异常的患者中，发现光栅视力与识别视力之间存在非常大的差异。在非弱视患者中，视力差异并不比正常眼睛的儿童更大。通过光栅视力检测出的弱视程度比通过识别视力检测出的要轻；然而，光栅视力对屈光性和器质性弱视敏感，对斜视性弱视不敏感。可能的解释包括患者眼部疾病的异质性、单视力与线性视力、刺激大小和刺激的相对复杂性。这些结果有助于评估语言前患者的PL光栅视力，并建议对刺激进行修改以研究弱视的发生机制。
