Taber's Medical Dictionary
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(af′tĕr-im′ăj)
An image that persists subjectively after cessation of the stimulus. If colors are the same as those of the object, it is called positive; it is called negative if complementary colors are seen. In the former case, the image is seen in its natural bright colors without any alteration; in the latter, the bright parts become dark, while dark parts are light.
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(af′tĕr-im′ăj)
An image that persists subjectively after cessation of the stimulus. If colors are the same as those of the object, it is called positive; it is called negative if complementary colors are seen. In the former case, the image is seen in its natural bright colors without any alteration; in the latter, the bright parts become dark, while dark parts are light.
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