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An eye twitch is an involuntary, abnormal blinking of your eyelid. This abnormal blinking may happen many times per day. If eye twitching is severe, it can impair vision.

Glioblastoma multiforme (GBM) is the most common brain tumor in adults. Treatment is aggressive and involves surgery, radiation, and chemotherapy.

Herpes eye disease is a group of eye disorders caused by infection with the herpes simplex virus (HSV).

Keratoconus is an eye disorder in which your cornea slowly thins over time. The cornea also bulges out over time, to form a cone-like shape. Keratoconus causes nearsightedness (myopia) and blurry vision.

Labyrinthitis is the inflammation of part of the inner ear called the labyrinth. The inflammation causes vertigo, hearing loss, and other symptoms.

Left bundle branch block is a problem with the heart’s electrical wiring (conduction) system. Read on for details about this condition.

Lichen sclerosus is a long-term (chronic) skin condition. It causes the skin to become thin, white, and wrinkly.

McArdle disease is a rare muscle disorder. In McArdle disease, the muscle cells can’t effectively store energy. Read on to learn more.

Microscopic polyangiitis (MPA) is a condition that causes small blood vessels to be inflamed. It's a rare type of vasculitis. The disease can damage the blood vessels and cause problems in organs around the body. Read on to learn about causes, symptoms, diagnosis, and treatment.