Abstract

Several implications of Metcalf’s apodization model of the Stiles–Crawford effect are presented in this paper. Metcalf showed that there should be a slight smearing of the point-spread function due to the Stiles–Crawford effect. It will be shown that this smearing is approximately equal to the size of a foveal cone. As an obvious consequence of this smearing, there is a decrement in the modulation transfer function for high spatial frequencies. But unexpectedly, there is an increment in the MTF for low spatial frequencies.

© 1980 Optical Society of America

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