What is an arcuate defect in the eye?
Definition. A localized defect in the visual field bordered by an area of normal vision. This occurs with a variety of EYE DISEASES (e.g., RETINAL DISEASES and GLAUCOMA), OPTIC NERVE DISEASES, and other conditions. [
What is the visual effect of scotoma?
Scotomas are a type of aura, a visual phenomenon, that’s fairly common. Scintillating scotomas may look wavy or alternate growing from dark to light again. The edges of the spot you see are often jagged. Headache pain may occur along with scintillating scotomas, or you may feel no pain at all.
What is the cause of ring like Scotomas in the visual field?
Ring scotoma is an annular field defect centered on fixation. Age-related macular degeneration in the elderly and hydroxychloroquine toxicity in younger patients are usual causes of central ring scotoma. We report bilateral ring scotoma as the presentation of adult onset Stargardt’s disease.
What is a scotoma in medical terms?
Medical Definition of scotoma : a spot in the visual field in which vision is absent or deficient.
What is altitudinal scotoma?
Altitudinal visual field defect (VFD), which involves the loss of visual sensation in the horizontal half of the visual field, is caused mainly by anterior ischemic optic neuropathy (AION),1,2,3 or rarely by compressive neuropathy due to a tumor or aneurysm.
What is an Anopia?
Anopia, also known as blindness, is the absence of vision due to either a structural defect of the eye(s) or the lack of the eye(s) completely.
What is a scotoma in psychology?
n. an area of partial or complete loss of vision in the visual field. Vision may be depressed (relative scotoma), altered (scintillating scotoma), or completely lost (absolute scotoma). Scotomas can occur either in the central visual field (see central scotoma) or in the periphery (see paracentral scotoma).
What is arcuate scotoma?
Arcuate scotoma (Concept Id: C0271198) A localized defect in the visual field bordered by an area of normal vision. This occurs with a variety of EYE DISEASES (e.g., RETINAL DISEASES and GLAUCOMA), OPTIC NERVE DISEASES, and other conditions. Arcuate scotoma
What is a scotoma in the eye?
What is a Scotoma (Blind Spot in Vision)? When you have a scotoma, it means you are experiencing a blind spot in your field of vision. This condition may be temporary or permanent. It could also stay within the same area or shift elsewhere in your vision.
What is the pathophysiology of glaucoma scotoma?
Glaucomatous damage to a nerve fiber bundle containing axons from both the inferonasal and inferotemporal retina resulted in the arcuate defect shown. The scotoma often begins as a single area of relative loss, which then becomes larger, deeper, and multifocal.
What is peripheral scotoma?
peripheral scotoma an area of depressed vision toward the periphery of the visual field. physiologic scotoma that area of the visual field corresponding with the optic disk, in which the photosensitive receptors are absent. positive scotoma one which appears as a dark spot in the visual field.