Abstract

The recent development in the use of sinusoidal gratings for the analytical study of optical systems has been applied to the effects of focus and pupil aperture on visual resolution. For an eye with a dilated pupil, the in-focus position is shown to depend upon the spatial frequency of the test target. The effective refractive power of the eye increases for the detection of low-frequency gratings. If the eye is corrected for this change in effective refractive power, an improvement of about 70% in contrast sensitivity occurs for low spatial frequencies. The implications of these findings on the phenomenon of “night myopia” are discussed.

© 1965 Optical Society of America

Full Article  |  PDF Article
Related Articles
Foveal optical modulation transfer function of the human eye at various pupil sizes

Jyrki Rovamo, Heljä Kukkonen, and Juvi Mustonen
J. Opt. Soc. Am. A 15(9) 2504-2513 (1998)

Effect of instrumental spherical aberration on visual image quality

Kevin Lyons, Desmond Cheng, and Pantazis Mouroulis
J. Opt. Soc. Am. A 13(2) 193-205 (1996)

Interferometric measurement of visual acuity and the effect of ocular chromatic aberration

Larry N. Thibos, Arthur Bradley, and David L. Still
Appl. Opt. 30(16) 2079-2087 (1991)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription