Funduscopic SystemsMagnification in Ametropia and Aphakia
作者:
THOMAS RAASCH,
期刊:
American Journal of Optometry and Physiological Optics
(OVID Available online 1985)
卷期:
Volume 62,
issue 1
页码: 19-24
ISSN:0093-7002
年代: 1985
出版商: OVID
关键词: ophthalmoscopy;funduscopy;Hruby lens;Bayadi lens;fundus contact lens;aphakia;aniseikonia
数据来源: OVID
摘要:
ABSTRACTThe magnification of the fundus image with various forms of funduscopy in ametropia and aphakia is poorly understood. This paper investigates these relationships. Direct and indirect ophthalmoscopy and biomicroscopic funduscopy is included. The Gullstrand Simplified Schematic Eye is modified by changing either the axial length, the power of the cornea, or the index of refraction of the lens to produce ametropia. Aphakia is produced by considering these same eyes with the crystalline lens removed. The magnification of these various eye/funduscope systems is presented, along with general principles illustrated by the figures.
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