Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Detection of Time-Varying Light Signals as Measured by the Pupillary Response

Not Accessible

Your library or personal account may give you access

Abstract

The apparent brightness with which a light stimulus is perceived is determined not only by the average luminance of the stimulus, but also by its temporal properties. For instance, if the luminance is modulated periodically below the flicker-fusion frequency, the observed brightness appears, in general, to be higher than the observed brightness of an equal-average constant luminance. The pupillary response of the human eye, which seems to be well correlated with the observed brightness, has been analyzed quantitatively as a function of the modulation index and frequency for sinusoidal modulation. Under certain quite general assumptions, it is possible to predict the presence of a peripheral linear low-pass filter in the visual system. It is shown how the characteristics of this linear filter can be determined from the experimental data. The break frequency turns out to be around 9 cps and the high-frequency cutoff has a slope of 18 dB/octave.

© 1968 Optical Society of America

Full Article  |  PDF Article
More Like This
A Masking Technique for Isolating the Pupillary Response to Focused Light*†

Jack M. Fugate
J. Opt. Soc. Am. 44(10) 771-775 (1954)

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)

Triple-Function Ocular Monitor

William D. O’Neill and Lawrence Stark
J. Opt. Soc. Am. 58(4) 570-573 (1968)

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 Optica member, or as an authorized user of your institution.

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

Figures (9)

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

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

Tables (1)

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

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

Equations (15)

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

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved