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Aura in vision, nausea, dizziness, brain fog: Complications: Migraine onset: Duration: Less than 60 minutes: Causes: Cortical spreading depression: Risk factors: Migraine sufferer: Differential diagnosis: Persistent aura without infarction, Retinal migraine: Prevention: Avoiding migraine triggers: Prognosis: Self-limiting
Causes. Retinal migraine is caused by the blood vessels (that leads to the eye) suddenly narrowing (constricting), reducing blood flow to the eye, which causes aura in vision. It may be triggered by: Stress; Smoking; High blood pressure; Oral contraceptive pill; Exercise; Hay fever; Bending over; High altitude; Dehydration; Low blood sugar ...
Superior oblique myokymia is a neurological disorder affecting vision and was named by Hoyt and Keane in 1970. [1] It is a condition that presents as repeated, brief episodes of movement, shimmering or shaking of the vision of one eye, a feeling of the eye trembling, or vertical/tilted vision.
Specialty. Neurology, ophthalmology. Symptoms. Temporary fleeting of vision in one or both eyes. Complications. Stroke [1] [2] Duration. Seconds to hours. Amaurosis fugax ( Greek: ἀμαύρωσις, amaurosis meaning 'darkening', 'dark', or 'obscure', Latin: fugax meaning 'fleeting') is a painless temporary loss of vision in one or both eyes.
In one of the better-known examples, the rhesus macaque became the go-to model for polio researchers, but unlike humans, the animal was not orally susceptible to the virus; it only developed polio ...
Neurology, ophthalmology. Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. [1] Also called double vision, it is a loss of visual focus under regular conditions, and is often voluntary.
The retina lines the inside of the eye. It is light-sensitive and communicates visual messages to the brain. If the retina detaches, it moves and shifts from its normal position. This can cause photopsia, but can also cause permanent vision loss. Medical attention is needed to prevent vision loss.
Most common cause. Almost all patients will experience some form of vision dysfunction. Partial vision loss can occur through the duration of the disease; total vision loss occurs in severe cases and late stages. It may lead to complete or partial loss of vision in one or both eyes. Partial, transient vision loss (lasting less than one hour ...
Signs and symptoms. Central retinal artery occlusion is characterized by painless, acute vision loss in one eye. [1] Upon fundoscopic exam, one would expect to find: cherry-red spot (90%) (a morphologic description in which the normally red background of the choroid is sharply outlined by the swollen opaque retina in the central retina ...
Symptoms. Loss of vision. Diagnostic method. Eye examination. Functional visual loss (FVL) also known as Functional vision loss or Nonorganic visual loss (NOVL) is a reduction in visual acuity or loss of visual field that has no physiological or organic basis.