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visual field defect |
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visual field defect, one or more spots or defects in the vision that remain constant in position, unlike a floater. This fixed defect is usually caused by damage to the retina or visual pathways, such as by retinal detachments, chorioretinitis, traumatic injury, macular degeneration, glaucoma, or a vascular occlusion of the eye or the brain. Sudden loss of a noticeable part of the visual field warrants ophthalmologic examination. An Amsler grid detects defects only in the central 30°-not the entire visual field. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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