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Visual loss results in the absence of vision where it existed before, which can happen either acutely or over a long period of time. The effects of visual loss can, before the acquisition of alternative adaptations and skills, be devastating; especially when a person's vision disappears over a short period of time. Vision can refer to: Visual perception is one of the senses. ...
Acute may refer to: An acute accent is a diacritic character. ...
Acute visual loss Acute visual loss may be dramatic in presentation, and is almost always alarming to the person experiencing the loss. It may be caused by media opacities, retinal disease, optic nerve disease, visual pathway disorders, or functional disorders, or it may be in fact an acute discovery of chronic visual loss. Human eye cross-sectional view. ...
The optic nerve is the nerve that transmits visual information from the retina to the brain. ...
Media opacity Opacities of the clear refractive media of the eye such as the cornea, anterior chamber, lens (anatomy), and vitreous humor may cause acute visual loss as manifested by blurry vision or reduced visual acuity. While pupillary reflexes may be affected, these conditions generally do not cause a relative afferent pupillary defect. An eye is an organ that detects light. ...
The cornea is the curved, transparent layer that covers the front part of the eye and protects its inner structures. ...
The lens or crystalline lens is a component of the eye. ...
Vitreous humour is the clear gel that fills the eyeball, lying between the lens and the retina in the eye. ...
Visual acuity is the eyes ability to detect fine details and is the quantitative measure of the eyes ability to see an in-focus image at a certain distance. ...
In medicine, pupil constriction (also known as the pupillary reflex) is reduction of pupil size. ...
Causes of media opacity include corneal edema, hyphema, cataract and vitreous hemorrhage. Cataract is also used to mean a waterfall or where the flow of a river changes dramatically. ...
Retinal disease Retinal diseases may cause sudden visual loss. Because the retina is being affected, there is usually a concomitant relative afferent pupillary defect. Conditions that affect or destroy the retina include retinal detachment; macular disease (e.g., macular degeneration); and retinal vascular occlusions, the most important of which is central retinal artery occlusion. Retinal detachment is a disorder of the eye in which the retina peels away from its underlying layer of support tissue. ...
Human eye cross-sectional view. ...
Human eye cross-sectional view. ...
Optic nerve disease Diseases which affect the optic nerve may cause acute visual loss. Signs include an abnormal pupillary reflex, with an afferent pupillary defect when the optic nerve disease is unilateral. In medicine, a sign is a feature of disease as detected by the doctor. ...
The optic nerve can be affected by optic neuritis, retrobulbar neuritis, papillitis, papilledema, ischemic optic neuropathy, and giant cell arteritis. The optic nerve is the nerve that transmits visual information from the retina to the brain. ...
Optic neuritis is the inflammation of the optic nerve that may cause a complete or partial loss of vision. ...
Papilledema is optic disc swelling that is caused by increased intracranial pressure. ...
Temporal arteritis, also called giant cell arteritis (GCA) is an inflammatory disease of blood vessels (most commonly large and medium arteries of the head). ...
Visual pathway disorder Visual pathway disorders are any problems that may impede the visual pathway. Rarely, acute visual loss is caused by homonymous hemianopia and, more rarely, cortical blindness.
Functional disorder The term functional disorder is now used where hysterical and malingering were historically used. This shift recognizes the inherent inability of the physician to identify the subjective experience of a patient (and thus whether that patient can truly see or not). For the album, see Hysteria (album) Professor Jean-Martin Charcot was well-known for showing, during his lessons at the Salpêtrière hospital, hysterical woman patients – here, his favorite patient, Blanche (Marie) Wittman, supported by Joseph Babinsky. ...
Malingering is a psychological term that refers to an individual faking the symptoms of mental or physical disorders. ...
External links - Living with Vision Loss - American Foundation for the Blind
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