Marginal Aberrations of Different Bifocal‐Lens Designs
作者:
BARRY WEISSMAN,
MEREDITH MORGAN,
期刊:
American Journal of Optometry and Physiological Optics
(OVID Available online 1977)
卷期:
Volume 54,
issue 9
页码: 588-594
ISSN:0093-7002
年代: 1977
出版商: OVID
关键词: lens aberrations;bifocals;marginal astigmatism;chromatic aberration;bifocal design;base curves;prismatic dispersion;modified Vertometer.
数据来源: OVID
摘要:
Marginal astigmatism and longitudinal chromatic aberration were measured (with a modified Vertometer) for +2-D bifocal lenses of different designs, base curves, and major-lens powers. At a reading level 20 deg below the pole of the major lens, deterioration of the optical image occurred and was created by the interaction of marginal astigmatism (tangential error) and lateral chromatic aberration (prismatic dispersion). Suggestions for selecting an optimal bifocal-lens design for different types of refractive error are presented.
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