Abstract
The experiments prove that violet vision and yellow vision are concurrent and dependent.
Violet vision is primarily affected and violet light is experienced in the dark-adapted eye.
The action is regarded as associated with the mechanism of the perception of "self-light" and is compared to physiological fatigue of violet perception.
The seat of action is probably retinal.
It is suggested that the action is due to a transformation of santonin to some other substance, probably the allied coloured compound.
The bearing of the photo-electrical theory on santonin xanthopsia is discussed.
Footnotes
- Received June 27, 1927.
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