Abstract

A study of the variation of pupil diameter with illumination of the retina indicates that the photo-pupil reflex is confined to the photopic range of illumination. On the basis of this result, the hypothesis is proposed that the photo-pupil reflex is essentially initiated by cone response. Suggestions are made for further investigation.

© 1949 Optical Society of America

Comment on “A Note on the Photo-Pupil Reflex”

Henry A. Knoll
J. Opt. Soc. Am. 39(11) 954-954 (1949)

Optimizing the Use of the Criterion Response for the Pupil Light Reflex*

John G. Webster, Gerald H. Cohen, and Robert M. Boynton
J. Opt. Soc. Am. 58(3) 419-424 (1968)

A Comparison of Electrical and Psychophysical Determinations of the Spectral Sensitivity of the Human Eye

Lorrin A. Riggs, Richard N. Berry, and Matthew Wayner
J. Opt. Soc. Am. 39(6) 427-436 (1949)

The Course of Foveal Light Adaptation Measured by the Threshold Intensity Increment*

Howard DeHaven Baker
J. Opt. Soc. Am. 39(2) 172-179 (1949)

The Coefficient of Specific Resolution of the Human Eye for Foucault Test Objects Viewed through Circular Apertures*

Howard S. Coleman, Madeline F. Coleman, David L. Fridge, and Samuel W. Harding
J. Opt. Soc. Am. 39(9) 766-770 (1949)