Abstract

We have measured contrast-sensitivity functions for thirty low vision observers and twenty normal observers. Preliminary analysis indicates that when the results are plotted as log contrast sensitivity vs log spatial frequency, every observers’ data can be well described by the same parabolic curve, shifted horizontally and vertically. This means that the entire contrast-sensitivity function may be specified by just two numbers, such as peak contrast sensitivity and the cutoff spatial frequency.

© 1986 Optical Society of America