visual field defect

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 ophthalmological examination. An Amsler grid detects defects only in the central 30°-not the entire visual field.

vis·u·al field de·fect

(vizh'ū-ăl fēld dē'fekt)
Specific types of vision loss due to problems in the eye itself or the brain.
References in periodicals archive ?
The loss of RGC was estimated by evaluating the visual field defect characteristics in patients with POAG and NAION (Table 1).
Glaucoma diagnosis was based on a lack of optic disc pallor in patients having visual field defect consistent with typical glaucomatous optic disc appearance.
Correlation between central corneal thicknessand visual field defect, cup to disc ratio and retinal nerve fiber layerthickness in primary open angle glaucoma patients.
Ophthalmic examination exposed a temporal visual field defect [Figure 1]c.
Visual field defect is most frequently in the form of bitemporal hemianopsia and superior temporal defect.
Hemianopia is a type of visual field defect which means people lose vision on the same side in both eyes.
Bruce found he had a severe visual field defect, which is often caused by tumours.
The second research question is related to the type of visual field defect.
Funduscopic examination was normal, but he had a visual field defect in the left eye.