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

Red–green flicker photometry and nonlinearities in the flicker electroretinogram

Not Accessible

Your library or personal account may give you access

Abstract

We investigated whether responses from different cone classes are combined before or after the nonlinearity that is responsible for generating nonlinear response components of the flicker electroretinogram (ERG). We measured the nonlinear response of the retina while systematically varying the modulation in the long-wavelength-sensitive and middle-wavelength-sensitive cones by changing the proportions of flickering 633- and 543-nm lights that compose a sum-of-sinusoids temporal waveform. We found that at high temporal frequencies the ERG responses are best accounted for by a model in which the principal retinal nonlinearity is located before the convergence of signals from the two cone classes. At low temporal frequencies the ERG signal is dominated by cone-antagonistic responses. At frequencies of 30 Hz and higher, the flicker ERG and psychophysical flicker photometry give similar estimates of the relative proportions of long- and middle-wavelength-sensitive cones. The ERG photometric null is frequency dependent, whereas the psychophysically determined ratio is much less sensitive to changes in frequency.

© 1993 Optical Society of America

Full Article  |  PDF Article
More Like This
Electroretinogram flicker photometry and its applications

Gerald H. Jacobs, Jay Neitz, and Kris Krogh
J. Opt. Soc. Am. A 13(3) 641-648 (1996)

Origin of deficits in the flicker electroretinogram of the cone system in X-linked retinoschisis as derived from response nonlinearities

Kenneth R. Alexander, Claire S. Barnes, and Gerald A. Fishman
J. Opt. Soc. Am. A 18(4) 747-754 (2001)

Analysis of retinal light adaptation with the flicker electroretinogram

Shuang Wu and Stephen A. Burns
J. Opt. Soc. Am. A 13(3) 649-657 (1996)

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

Select as filters


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