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DefinitionAkinetopsia, often called “motion blindness,” is a rare neurological disorder in which a person cannot perceive motion in their visual field. Instead of seeing continuous movement,...
DefinitionAlacrima means the eyes do not make enough tears or, in some people, almost no tears at all. Tears are not only “water.” Healthy tears are...
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DefinitionAlagille syndrome is a rare genetic disorder that primarily affects the liver and heart, but can also involve the eyes, skeleton, kidneys, and blood vessels. It...
DefinitionÅland Islands Eye Disease (AIED), also called Forsius–Eriksson syndrome, is a rare, inherited eye condition that mostly affects boys and men because it is X-linked recessive....
DefinitionAlcohol-induced amnesia, often referred to as alcohol-induced blackouts or memory lapses, is a condition where individuals experience significant memory loss after consuming alcohol. In this article,...
DefinitionAlexia without agraphia, often called pure alexia or word blindness, is a rare neurological condition in which a person loses the ability to read printed text...
DefinitionAlice in Wonderland Syndrome (AIWS) is a rare condition that affects perception, causing distortions in the senses. Named after Lewis Carroll’s famous novel, this syndrome can...
DefinitionAlice in Wonderland Syndrome (AIWS) is a rare neurological condition that makes a person’s perceptions of their own body or the world around them feel distorted....
DefinitionAlkaptonuria (AKU) is a rare, inherited metabolic disease. It happens when the body cannot break down a chemical called homogentisic acid (HGA). This problem comes from...
DefinitionAlpha-Gal Syndrome (AGS) is a potentially life-threatening, IgE-mediated allergic condition in which the body reacts to the carbohydrate galactose-α-1,3-galactose (alpha-gal) found in most mammals. Unlike most...
DefinitionAmantadine-induced corneal edema is a rare but recognized toxic reaction in which the drug amantadine damages the inner cell layer of the cornea (the endothelium), leading...
