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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.
Acute zonal occult outer retinopathy (AZOOR) is an inflammatory retinopathy in the category of white dot syndromes typified by acute loss of one or more zones of outer retinal function associated with photopsia, minimal funduscopic changes and abnormal electroretinography findings.
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 retinal photoreceptor cells travel in the following way:
Confrontation visual field testing is an important part of a routine ophthalmological or neurological examination. It can be used for rapid and gross assessment of large-scale visual field problems due to ophthalmological or neurological diseases, such as homonymous and heteronymous hemianopias, quadranopsia, altitudinal visual loss, central/centrocecal scotoma etc. [1] [2] Test using a red ...
Uveitis, Glaucoma, and Hyphema are the classic sins of UGH syndrome, but the term is often used when one, two, or all three signs are present in the presence of any IOL causing mechanical irritation of the iris or angle structures. [3]
In visual perception, retinal correspondence is the inherent relationship between paired retinal visual cells in the two eyes.Images from one object stimulate both cells, which transmit the information to the brain, permitting a single visual impression localized in the same direction in space.
Diagram of the human eye. The retina is the layer of tissue at the back of the eye that receives light and converts it into a signal which travels along the optic nerve to be processed into visual perception by the brain.
Peripheral Ulcerative Keratitis (PUK) is a group of destructive inflammatory diseases involving the peripheral cornea in human eyes. [1] The symptoms of PUK include pain, redness of the eyeball, photophobia, and decreased vision accompanied by distinctive signs of crescent-shaped damage of the cornea.