IMPAIRMENT OF CONTRAST DISCRIMINATION IN AMBLYOPIC EYES
IMPAIRMENT OF CONTRAST DISCRIMINATION IN AMBLYOPIC EYES
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DOI：
10.1111/j.1475-1313.1987.tb00779.x
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发表时间：
1987-01-01
影响因子：
2.9
通讯作者：
FISHER, SK
中科院分区：
文献类型：
--
作者：
CIUFREDA, KJ;FISHER, SK
A successive two-alternative, forced-choice procedure incorporating a double-interleaved staircase was used to measure monocular contrast discrimination in strabismic and/or anisometropic amblyopes, strabismics without amblyopia, and normals. Standard contrast was 25%, with comparison contrasts starting at 10 and 40%. Spatial frequencies were 0.5, 2.0, and either 4.0 or 8.0 c deg-1. The amblyopic eye consistently required more contrast than the fellow dominant eye for the task. Results in each of the normals and strabismics without amblyopia were similar and normal. The findings clearly demonstrate impairment of contrast discrimination in amblyopic eyes, presumably due to early abnormal visual experience. Such impairment could contribute to the increased steady-state accomodative error found in amblyopic eyes.
