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]

photopsia

/pho·top·sia/ (fo-top´se-ah) 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.
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

awareness of lights, sparks or colours, due to retinal pathology (e.g. incipient retinal detachment) or cerebral disease (including concussion)

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 ?
11 Associated Visual Pathologies Incipient Cataracts 2 -- Photopsia 2 1 Mild Central Macular 1 -- Edema Mild Macular 1 -- Degeneration LE = left eye, logMAR = logarithm of minimum angle of resolution, RE = right eye, VA = visual acuity, VF = visual field.
Safety of ivabradine: During the follow up period, one patient ran into decompensation and [beta]-blockers were stopped and resumed after 10 days, another patient developed photopsia when the dose of ivabradine reached 15 mg/day.
Ophthalmological evaluation should be considered, particularly if patients experience photopsia or experience new or increased vitreous floaters.
Symptoms of uveitis affecting the posterior segment of the eye may include photopsia (perceived flashes of light), floaters (appearing as spots or threads), scotomata (area of diminished vision), and metamorphopsia (vision distortion),4 which lead to vitreous haze and loss of BCVA.
Patients with PVD might experience photopsia (flashing lights) as vitreous tractions occurs (pulling on the retina), and floaters, which is the vitreous condensing.
Additional statistically significant ocular adverse events in the North American study included eye irritation, increased lacrimation, reduced visual acuity, vitreous hemorrhage, photophobia and photopsia.
PIC resembles POHS, but lesions tend to be more central and eatients are more symptomatic (blurred vision, photopsia, scotomata) although, like POHS, vitritis is minimal or absent.
Additionally, in the North America study, other statistically significant ocular adverse events included eye irritation, increased lacrimation, reduced visual acuity, vitreous hemorrhage, photophobia and photopsia.
Important features in this regard are: documented increase in size or thickness; the accumulation of orange pigment (lipofuscin) on the surface of the lesion; a large area of serous retinal detachment; photopsia in association with a suspiciously large lesion.
Sometimes photopsia can result from a retina that has been traumatised or harmed from a previous disease process, such as AMD, and occasionally it results from retinal stimulation as a tumour or other expanding lesion displaces the retina.
Symptoms include headaches, scotomata, diplopia, dimness in vision and photopsia.
Symptoms include headache, scotoma, diplopia, dimness in vision, and photopsia.