Retinal Image Quality during Oblique Gaze through Spectacle LensesPlastic*vs. Glass
作者:
STEPHEN CODE,
ARNULF REMOLE,
期刊:
American Journal of Optometry and Physiological Optics
(OVID Available online 1985)
卷期:
Volume 62,
issue 4
页码: 240-245
ISSN:0093-7002
年代: 1985
出版商: OVID
关键词: ophthalmic plastic;ophthalmic glass;border enhancement;narrow-angle scattering;ocular duction
数据来源: OVID
摘要:
The optical performance of standard plastic and glass spectacle lenses was compared at increasing angles of oblique gaze up to 40° on either side of the optic axis of the lenses. For this purpose, the border enhancement method was used, a method which is suitable for monitoring small order changes in the retinal image. It was found that the enhancement band width increases with obliquity of gaze in all cases, signifying a deterioration in the retinal image. A glass lens will exaggerate this deterioration to some extent, whereas a plastic lens will exaggerate it to the greatest extent. It is shown that the relatively poorer performance of plastic is due to a relatively larger amount of narrow-angle scattering than is produced by glass.
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