Migraine, ocular
A migraine involving the eyes that results in distortion of visual images, accompanied or followed by headache. An ocular migraine usually affects only one eye at a time. Image distortion generally begins in the center of the image and then moves to one side. Images ‘gray out’ or look wavy, and sight may be lost temporarily. Also known as retinal migraine.
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- Migraine, ophthalmic
Migraine involving the eyes but without headache. Migraine, due to a spasm of blood vessels in the brain, usually causes a headache. Flashes of light may appear as jagged lines or “heat waves” in one or both eyes and often last 10-20 minutes, sometimes without a headache. This is termed ophthalmic migraine, or migraine without […]
- Migraineur
A person who has migraine headache. Borrowed from the French.
- Migrainous neuralgia
Characterized by the absence of sustained periods of remission, chronic cluster headache may start with no past history of cluster headaches, or it may emerge several years after the patient has experienced an episodic pattern of cluster headaches. The episodic and acute forms of cluster headache may transform into one another, so it seems most […]
- Mild cognitive impairment
Abbreviated MCI. A brain disorder in which thinking abilities are mildly impaired. Individuals with mild cognitive impairment are able to function in everyday activities but have difficulty with memory — trouble remembering the names of people they met recently, remembering the flow of a conversation, and a tendency to misplace things. The individual may be […]
- Miliary aneurysm
An aneurysm that is tiny like a millet seed. Miliary aneurysms tend to affect minute arteries in the brain and, in the eye, in the retina. One of the botanical borrowings by medicine, “miliary” refers to the millet seed, millet being a small-grained rather inferior cereal grass. Its seed measures about 2 millimeters in diameter.