Effects of astigmatic defocus on binocular contrast sensitivity.

ABSTRACT:

Purpose

To determine the effects of astigmatism on contrast sensitivity (CS).

Methods

Eighteen normal volunteers (30.5 ± 6.0 [mean ± SD] years) were recruited. After correcting each refractive error by spectacles, against-the-rule (ATR) or with-the-rule (WTR) astigmatism of +1.00, +2.00 and +3.00 D was intentionally produced in both eyes, and then binocular CS was measured. The cylindrical addition of different powers (+1.00-+3.00 D) was compensated with spherical lenses so that the spherical equivalent refraction became zero in each eye. Subsequently, the above cylindrical addition was monocularly induced, and binocular CS was measured again. The relation between CS and astigmatic power, axis, and monocular or binocular astigmatism was investigated.

Results

With bino

SUBMITTER: Hasegawa Y 

PROVIDER: S-EPMC6091947 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature