Effect of the Illumination and the Types of the Lenses on Near Visual Acuity in Low Vison Patients.

Shin, Dong Su; Jung, Sung Won; Ahn, Sang Ki; Koo, Bon Sool

Original Article

Journal of the Korean Ophthalmological Society 1997;38(9):1677-1681.
Published online September 1, 1997.

Effect of the Illumination and the Types of the Lenses on Near Visual Acuity in Low Vison Patients.

Dong Su Shin, Sung Won Jung, Sang Ki Ahn, Bon Sool Koo

Department of Ophthalmology, Sung-Ae General Hospital.

조명 및 볼록렌즈의 종류가 저시력환자의 근거리시력에 미치는 영향

신동수(Dong Su Shin),정성원(Sung Won Jung),안상기(Sang Ki Ahn),구본술(Bon Sool Koo)

Abstract

To obtain adequate information of illumination and lens types for visual acuity test of low vision patient, the relation between various illumination and vision was evaluated. Visual acuity for near and effective lens types were examined. Among the 28 patients (of 36 eyes), intensities of illumination were set at 200, 500, 1000 and 2000lux and the lenses of biconvex, aspheric and aplanatic were tested. The best visible range of illumination for the low vision patients was 500-1000lux, with lower power diopter for the same visual acuity and with aspherin and aplantic lenses. Results attained by our study may be applied for appropriate condition of illumiation and type of lens in the low vision care.

Key Words: illumination;Lens types;Low vision