Freeman–Sheldon syndrome (also called Freeman–Burian syndrome or distal arthrogryposis type 2A) is a very rare condition that starts before birth. It mainly ...

Ectodermal dysplasia (ED) is a group of inherited conditions that affect body parts that grow from the ectoderm, which is the outer layer of the early embryo. ...

Chiari malformations are conditions where parts of the brain at the back of the head sit lower than they should. In Chiari I, the lower part of the cerebellum ...

Bosma Arrhinia Microphthalmia Syndrome (BAMS) is a very rare genetic condition. Babies are born with a missing or very under-developed nose (this is called ...

Alzheimer’s disease is best known as a brain disease that causes memory loss. The eyes and the visual system are part of the nervous system too. The retina is ...

Alkaptonuria (AKU) is a rare, inherited metabolic disease. It happens when the body cannot break down a chemical called homogentisic acid (HGA). This problem ...

Ocular Ischemic Syndrome (OIS) is a serious eye condition that happens when the eye does not get enough blood and oxygen for a long time. In simple words, the ...

Cosmetic lasers and light-based beauty devices are used for hair removal, skin resurfacing, tattoo removal, acne scars, blood vessels, and wrinkles. These ...

Ocular graft-versus-host disease (oGVHD) is an eye problem that can happen only after an allogeneic stem cell or bone marrow transplant. In this transplant, ...

Ocular Features of Mucopolysaccharidosis (MPS) is a group of rare, inherited conditions where certain long sugar chains called glycosaminoglycans (GAGs) build ...

A craniopharyngioma is a slow-growing, benign brain tumor that usually sits above the pituitary gland and next to the optic chiasm (the crossing of the optic ...

Ocular discomfort is any unpleasant feeling on the surface of the eye or around the eyelids. It can feel dry, sandy, scratchy, itchy, hot, burning, watery, ...

Ocular decompression retinopathy (ODR) is an eye problem that can happen after eye pressure drops very quickly. Eye doctors call eye pressure “intraocular ...

Ocular candidiasis means a yeast infection in or on the eye. The yeast is most often Candida. The common species is Candida albicans, but other species like C. ...

An ocular bee injury means a bee or similar insect has harmed the eye or the tissues around the eye. The harm can be from a sting, from the stinger staying in ...

Ocular anesthesia–induced injury is harm to the eye or the area around the eye caused by the way eye anesthesia is given or by the anesthetic drug itself. Eye ...

Ocular amyloidosis means “amyloid” protein builds up in parts of the eye. Amyloid is a mis-folded protein that the body cannot clear well. Over time, the extra ...

Occult macular dystrophy is a rare, inherited eye condition that causes gradual loss of central vision even though the front and back of the eye can look ...

Occipital neuralgia is a pain problem that involves the greater, lesser, or third occipital nerves. These nerves start in the upper neck (mostly from the C2 ...

Occipital epilepsy is a kind of focal (partial) epilepsy that starts in the occipital lobes, which sit at the back of the brain and handle vision. Because the ...