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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Functional magnetic resonance imaging (MRI) studies have identified an occipital hypoactivation and a hyperactivation of the parietal lobe when micropsia occurs.
These symptoms were also associated with either visual illusions, including dysmetropsia, namely, macropsia and micropsia (objects or other people appearing bigger or smaller) and telopsia and pelopsia (objects or other people appearing respectively further or nearer), or disorders of consciousness, as feelings of derealization, depersonalization, somatopsychic duality (i.e., the idea to be split in two, more often vertically in the middle), and alteration in judgment of time.
In our opinion, simple illusions like macropsia or micropsia, metamorphopsia, illumination, colour or clarity, dysmorphopsia, plagiopsia, and achromatopsia may be explained by the loss of balance of this longitudinal temporooccipital network.
Functional magnetic resonance imaging of a child with Alice in Wonderland syndrome during an episode of micropsia. Journal of the American Association for Pediatric Ophthalmology and Strabismus, 14, 317-322.
In terms of presentation, 31(48.43 Percent) patients presented with complaint of decrease in vision; 13(20.31 Percent) with complaint of scotoma, 9(14.06 Percent) with metamorphopsia; 8(12.5 Percent) with micropsia; and 3(4.68 Percent) patients reported change in colours as their presenting complaint.
Common visual disturbances attributed to HPPD are recurrent geometric hallucinations, perception of peripheral movement, colored flashes, intensified colors, palinopsia, positive afterimages, haloes around objects, macropsia, and micropsia occurring spontaneously in individuals with no prior psychopathology.
WEE WOE Micropsia makes you see objects as tiny, as did Alice; OUT OF CONTROL Strangelove's alien hand
WEE WOE: Micropsia makes you see objects as tiny, as did Alice; OUT OF CONTROL: Strangelove's 'alien hand'
In this case, micropsia (seeing altered sizes and shapes, especially himself) was the central set of disabling symptoms that dominated the clinical picture.
Pero se puede senalar que la ingestion de uno o varios hongos induce un estado comunmente caracterizado por contracciones, temblores, convulsiones ligeras, entumecimiento de los miembros y una sensacion placentera de bienestar, se suelen generar deseos de cantar, bailar, gemir, gritar, etc., visiones coloridas, psiquedelicas y tambien macropsia (ver las cosas enormemente aumentadas) y/o micropsia; ocasionalmente se presentan accesos de agitacion seguidos de un sueno profundo.
The early symptoms of macular disease include metamorphopsia (distortion of vision), micropsia, macropsia, and delayed recovery after exposure to bright lights (so that the headlights of oncoming cars may make night driving very difficult).
Surgical decisions for ERM patients should be based primarily on their OCT changes and symptoms such as metamorphopsia or micropsia instead of preoperative visual acuity because there is a known association between reduced visual acuity and photoreceptor damage; therefore, these patients have poor visual prognosis.