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

A Study of Night Myopia

M. Koomen, R. Scolnik, and R. Tousey
J. Opt. Soc. Am. 41(2) 80-90 (1951)

Effects of luminance and stimulus distance on accommodation and visual resolution

Chris A. Johnson
J. Opt. Soc. Am. 66(2) 138-142 (1976)

Infrared Skiascopic Measurements of Refractive Changes in Dim Illumination and in Darkness

Newton B. Chin and Richard E. Horn
J. Opt. Soc. Am. 46(1) 60-66 (1956)

Influence of the State of Accommodation on the Visual Performance of the Human Eye*

José M. Otero
J. Opt. Soc. Am. 41(12) 942-948 (1951)

Accommodation and Scotopic Visual Acuity

S. M. Luria
J. Opt. Soc. Am. 51(2) 214-219 (1961)