Abstract

Experiments described in this paper demonstrate that a weak constant current when running through the eye ball may noticeably alter the sensitivity of rod vision as well as that of cone vision. The direction of these changes of sensitivity depends upon which pole is placed on the eye ball. In the case of cone vision this direction is also influenced by the wave-length of the light stimulus. The authors advance an hypothesis explaining the action of the constant current on the eye by changes in the relative concentration of Ca and K ions in the neighborhood of poles. Special experiments performed with Ca and K iontophoresis have confirmed this interpretation.

© 1947 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Studies of Rod-Process to Suprathreshold Light Stimuli with a Direct Current Method

Daizo Yonemura and Ryuichi Nango
J. Opt. Soc. Am. 47(9) 822-827 (1957)

Alleged Effects of the Near Ultraviolet on Human Vision

George Wald
J. Opt. Soc. Am. 42(3) 171-177 (1952)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

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

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

Figures (6)

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

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