photopsia

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photopsia

 [fo-top´se-ah]
an appearance as of sparks or flashes, in retinal irritation.

pho·top·si·a

(fō-top'sē-ă),
A subjective sensation of lights, sparks, or colors due to electrical or mechanical stimulation of the ocular system.
See also: Moore lightning streaks.
Synonym(s): photopsy
[photo- + G. opsis, vision]

pho·top·si·a

(fō-top'sē-ă)
A subjective sensation of lights, sparks, or colors due to electrical or mechanical stimulation of the ocular system.
Synonym(s): photopsy.
[photo- + G. opsis, vision]

photopsia

Visual sensations of light originating in the eyes or the nervous system and due to stimulation of the retinas or visual nerve pathways other than by light. Mechanical stimuli from traction on the retina by the VITREOUS BODY can cause photopsia. They are examples of entoptic phenomena. Also known as phosphenes.

photopsia 

Hallucinatory perceptions such as sparks, lights or colours arising in the absence of light stimuli and observed when the eyes are closed. They occur often as a result of diseases of the optic nerve, retina (e.g. retinal and vitreous detachment) or the brain, migraine, or they can also occur with pressure upon the closed eye. See floaters; flashes; cytomegalovirus retinitis; Fuchs' spot.
References in periodicals archive ?
Our case presented with vision deterioration in one eye and photopsias bilaterally.
Patients with AZOOR typically present with photopsia and scotomas.
Visual symptoms associated with choroidal neovascularitazion: photopsias and the Charles Bonnet syndrome.
We observed the patient in June 2002 and found a bilateral paleness of optic discs and the inability to count fingers with either eye; at that time, the patient complained of disturbing photopsias. A therapy with idebenone (270 mg/day) and brimonidine (2 drops, 3times/day) was initiated (Mashima et al.
Symptoms of both conditions usually include photopsias and decreased visual acuity.
The first perceived symptoms were loss of visual acuity (67%), visual field scotoma (40%), floaters (37%), photopsias (29%), and symptoms not related to the retinal detachment (9%), such as pain and ocular discomfort.