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idioretinal light

idioretinal light Idioretinal light is the faint, cloudy gray patches seen in the visual field when the eyes are not being stimulated and no after-images are present.

Idioretinal light is the faint, cloudy gray patches seen in the visual field when the eyes are not being stimulated and no after-images are present. In this historical usage, it refers to a visual phenomenon considered important in older theories of after-images.

Also see

Sources

Drafting source: Baldwin Dictionary of Philosophy and Psychology, 1901. 1901 New York Macmillan original; archive index checked 2026-10-18. “Idio-retinal Light” (Idio-retinal).
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PsychTerms (psychterms.org), CC BY 4.0, version 1. “idioretinal light.” Development preview.

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