[AFTER- 6.] The impression retained by the retina of the eye, or by any other organ of sense, of a vivid sensation, after the external cause has been removed.
1879. Syd. Soc. Lex., s.v., Newton suffered for many years from an after-image of the sun, caused by incautiously looking at it through a telescope. Ibid. After-images may also be experienced in the case of smells, tastes, tones, and impressions of contact.
