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Photic retinopathy is damage to the eye 's retina, particularly the macula, from prolonged exposure to solar radiation or other bright light, e.g., lasers or arc welders. The term includes solar, laser, and welder's retinopathy and is synonymous with retinal phototoxicity. [1] It usually occurs due to staring at the Sun, watching a solar ...
Acute vision loss. A Snellen chart, which is frequently used for visual acuity testing. Acute visual loss is a rapid loss of the ability to see. It is caused by many ocular conditions like retinal detachment, glaucoma, macular degeneration, and giant cell arteritis, etc. Video explanation ( script) [1]
Loss of vision, Visual field defects, and Blindness. Diagnostic method. Visual field test, Neuro-imaging. The visual pathway consists of structures that carry visual information from the retina to the brain. Lesions in that pathway cause a variety of visual field defects. In the visual system of human eye, the visual information processed by ...
Specialty. Ophthalmology. Retinal detachment is a disorder of the eye in which the retina peels away from its underlying layer of support tissue. [1] Initial detachment may be localized, but without rapid treatment the entire retina may detach, leading to vision loss and blindness. It is a surgical emergency.
Visual or vision impairment ( VI or VIP) is the partial or total inability of visual perception. In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment – visual impairment may cause the individual difficulties with normal daily tasks including reading and walking. [6]
Cortical blindness is the total or partial loss of vision in a normal-appearing eye caused by damage to the brain 's occipital cortex. [1] Cortical blindness can be acquired or congenital, and may also be transient in certain instances. [2] Acquired cortical blindness is most often caused by loss of blood flow to the occipital cortex from ...
Semaglutide, the active ingredient in Ozempic and Wegovy, has become a hugely popular medication thanks to its effectiveness for weight loss. But a growing body of research has linked the ...
Photopsia. This is an approximation of the zig-zag visual of a scintillating scotoma as a migraine aura. It moves and vibrates, expanding and slowly fading away over the course of about 20 minutes. Migraine with aura, which includes photopsia 39% of the time, typically lasts 10 to 20 minutes and often is followed by a headache.