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

Visual Sensitivity to the Rate of Electrically Produced Intermittence

Not Accessible

Your library or personal account may give you access

Abstract

Temporal resolution of the neural and cortical components of vision was studied with periodic electric stimuli as a means of by-passing the photochemical retina. Difference-limens for discriminating the frequency of the faint flashes of light due to the passage of current through the eye were obtained at 13 frequencies between 5 and 45 cps. The wave form of the periodic current was square with no dc component, and the current level was set by a method developed to produce electrical phosphenes of the same intensity at each frequency. Data from two observers give average deviations (ΔF) from the standard frequency (F) of 0.11 to 0.62 cps. The relative difference-limens, ΔF/F, lie between 0.009 and 0.03. Graphic integration of 1/ΔF gives 127 just noticeable differences in the range studied. The graph relating ΔF and F shows ΔF to be a complex function of F. Recent data on the discrimination of photic intermittence also show ΔF to be a complex function of F, although of a quite different form in the frequency range between 15 and 40 cps. These results with square waves of current are compared with earlier work on the differential sensitivity of the eye to the frequency of sine waves.

© 1956 Optical Society of America

Full Article  |  PDF Article
More Like This
Effect of Stimulus Duration on Electrical Responses of the Human Retina

E. Parker Johnson and Neil R. Bartlett
J. Opt. Soc. Am. 46(3) 167-170 (1956)

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 (4)

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

Select as filters


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