Effect of Induced Anisometropia on Stereoacuity by Far and Near Distance Random Dot Stereo Test.
- Author:
Mee Gyeong PARK
1
;
Yong Han JIN
Author Information
1. Department of Ophthalmology, National Police Hospital, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Anisometropia;
Color computer-assisted;
Far stereoacuity test
- MeSH:
Adult;
Anisometropia*;
Humans;
Mass Screening;
Refractive Errors;
Volunteers
- From:Journal of the Korean Ophthalmological Society
1996;37(5):862-870
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Induced refractive errors or anisometropia are known to cause reduction in stereoacuity. We compared the reduction of stereoacuities in anisometropia between far and near stereotests to determine the value of these tests as a screening tool of anisometropia. The far stereoacuity of 3m distance was tested with a red-green RDS developed with a color computer, and the near stereoacuity with TNO test in 10 normal adult volunteers. The effect of anisometropia. on the stereoacuity was tested by placing spherical lenses in 0.5 D steps bfore one eye(-2.0 D ~ +2.0 D). Stereoacuities tested at far showed a more rapid decrease than those at near as the power of the lenses was increased. The plus lenses showed more deteriorating effect on the stereoacuity than the minus lenses. And all subjects showed more than 620 arc seconds of stereoacuities with more diopter than +1.5D spherical lens. The far stereotest seems to be a more sensitive screening tool of anisometropia than the near stereotest especially in the mild degree(less than 2.0 D) of anisometropia.
