micropsia


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Related to micropsia: teleopsia

micropsia

[mī′kräp·sē·ə]
(medicine)
A visual disturbance in which objects appear undersized.
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References in periodicals archive ?
Stroke can also result in only colour blindness, prosopagnosia or micropsia without there being a total blindness.
Patients typically present with unilateral metamorphopsia, reduced visual acuity, a positive scotoma and micropsia.
The authors found that certain phenomena--such as increased intensity of colors, increased vividness of objects, macropsia, micropsia, and transient paranoia--were specific to the cocaine-induced psychotic state.
This perceptual minification, also known as accommodative micropsia, was first reported by Wheatstone in 1852 (as cited in Smith, Meehan, & Day, 1992) and may be of much greater practical importance today because of the growing use of virtual image displays.
Partial seizures arising from the temporal or frontal cortex may cause alterations in hearing, olfaction like unusual odours or psychic symptoms like sense of impending change, detachment, depersonalization, dejavu or illusions like micropsia or macropsia.
It is not uncommon, however, for patients with macular oedema to complain of micropsia.
The perceptual symptoms (objects perceived to be smaller and farther away) could be related to accommodative or convergence micropsia, in which objects appear either to shrink or to recede when accommodation or convergence increases while retinal image size remains constant (McCready, 1965; Ono, Muter, and Mitson, 1974).
Common symptoms of CSR are decreased vision with distortions including metamorphopsia, micropsia, scotoma, chromatopsia and prolonged after-images.
This may present with visual symptoms if it is located at the macula, as it will produce micropsia or visual distortion.
3) Patients may complain of blurring of central vision, dyschromatopsia, metamorphopsia, micropsia.
The patient will present with a sudden onset of unilateral blurred vision in association with a positive relative scotoma, micropsia or metamorphopsia.