Abstract

SYNOPSIS

Section I contains introductory remarks, and the consideration of the normal persistency curve of the author in order to determine the character of his type of color blindness.

Section II contains detailed descriptions of the reflex effects obtained in the right eye by fatiguing the left with colors of various wave lengths and with white light. The effect of darkness adaptation of the left eye upon color vision in the right eye is also studied.

Section III describes the direct effects of fatigue upon the right eye when colors and white light are used. Darkness adaptation of the right, or observing eye, is also considered.

In Section IV, various theoretical considerations are discussed with special reference to the bearing of the curves upon color theory. It is shown that the absence of reflex effects in the fatigue curves parallels the absence of negative after images in the author’s eye.

The curves strongly confirm the trichromatic theory of Color Vision, and show that in explaining color blindness the assumption of a separate white sensation is unnecessary. The cause of color blindness seems also to be largely connected with the efferent nerve fibres, the actions of which are shown to be greatly interfered with, or even suppressed, in defective Color Vision.

© 1924 Optical Society of America

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