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Symptoms include sudden permanent blindness, but may occur more slowly over several days, weeks or months, [3] dilated pupils.Pupillary light reflexes are usually reduced but present; the slow phase mediated by melanopsin in retinal ganglion cells is retained.
Not attributable to another disorder International Headache Society [ 7 ] Migraine without aura, classified as common migraine, represents a recurrent headache disorder characterized by moderate to severe throbbing pain, typically unilateral, and devoid of preceding visual or sensory disturbances known as auras.
Persistent aura without infarction (PAWOI) is a rare and seemingly benign [1] condition, first described in case reports in 1982 as "prolonged/persistent migraine aura status", [2] and in 2000 as "migraine aura status", [3] [4] that is not yet fully understood.
Acephalgic migraine (also called migraine aura without headache, amigrainous migraine, isolated visual migraine, and optical migraine) is a neurological syndrome.It is a relatively uncommon variant of migraine in which the patient may experience some migraine symptoms such as aura, nausea, photophobia, and hemiparesis, but does not experience headache. [1]
Recurrent painful ophthalmoplegic neuropathy (RPON), previously known as ophthalmoplegic migraine (OM), is a rare neurological disorder that is characterized by repeated headache attacks and reversible ipsilateral paresis of one or more ocular cranial nerves (CN). [1]
Rescue treatment involves acute symptomatic control with medication. [4] Recommendations for rescue therapy of migraine include: (1) migraine-specific agents such as triptans, CGRP antagonists, or ditans for patients with severe headaches or for headaches that respond poorly to analgesics, (2) non-oral (typically nasal or injection) route of administration for patients with vomiting, (3) avoid ...
Retinal dysplasia is an eye disease affecting the retina of animals and, less commonly, humans. It is usually a nonprogressive disease and can be caused by viral infections, drugs, vitamin A deficiency, or genetic defects. Retinal dysplasia is characterized by folds or rosettes (round clumps) of the retinal tissue.
Progressive retinal atrophy (PRA) is a group of genetic diseases seen in certain breeds of dogs and, more rarely, cats. Similar to retinitis pigmentosa in humans, [1] it is characterized by the bilateral degeneration of the retina, causing progressive vision loss culminating in blindness.