Atypical X-linked achromatopsia is a rare eye disease that affects how the cone cells in the retina work. Cone cells help us see fine detail and color. In this ...

Cone monochromatism is a rare eye problem where a person has only one working type of cone cell in the retina, instead of three different cone types like most ...

Retinal cone dystrophy type 3B is a very rare inherited eye disease that mainly damages the cone cells in the retina, which are the light-sensitive cells ...

Cone dystrophy with supernormal scotopic electroretinogram is a rare, inherited eye disease that mainly damages the cone cells in the retina, and later also ...

Cone dystrophy with supernormal rod electroretinogram is a rare eye disease that damages the light-sensing cells in the retina, especially the cone cells in ...

Cone dystrophy with supernormal rod response (CDSRR) is a very rare inherited eye disease where the cone cells in the retina slowly stop working properly, and ...

Chorioretinopathy syndrome is a general name for eye diseases that damage both the retina (the light-sensing layer) and the choroid (the blood-vessel layer ...

Macular atrophy-chorioretinopathy syndrome is a very rare eye disease present from birth. In this disease the back part of the eye (the retina) and the layer ...

Colobomatous optic disc-macular atrophy-chorioretinopathy syndrome is a very rare, inherited eye disease. In this condition, the nerve head at the back of the ...

Coloboma of the optic papilla means there is a “hole” or deep pit in the optic disc (optic nerve head) that is present from birth. The optic disc is the round, ...

Coloboma of the optic nerve means there is a small “missing piece” or deep hole in the tissue where the optic nerve meets the back of the eye. This hole is ...

Congenital coloboma of the macula lutea (macular coloboma) is a rare eye problem that is present from birth. In this condition, some of the normal tissue in ...

Coloboma of the macula (macular coloboma) is a rare birth problem of the eye in which a piece of the macula is missing or badly formed. The macula is the very ...

Coloboma of the choroid and retina (often called chorioretinal coloboma) is a birth defect of the back part of the eye. In this condition, there is a missing ...

Nodular unilateral glaucoma is a description, not an official single disease name. It usually means glaucoma in one eye (unilateral) that is caused or worsened ...

Cogan-Reese syndrome is a very rare eye disease. It affects the clear front window of the eye (the cornea), the colored part (the iris), and the fluid-drainage ...

Cerebroretinal microangiopathy with calcifications and cysts is a very rare inherited disease that mainly damages the tiny blood vessels in the brain and the ...

Choroiditis means inflammation in the choroid, which is a thin, rich blood-vessel layer under the retina at the back of the eye. This layer feeds the retina ...

Tapetochoroidal dystrophy is another name that has been used for choroideremia, an inherited eye disease that slowly damages the light-sensing retina and the ...

Choroideremia is a rare eye disease that slowly takes away sight over many years. It mainly affects boys and men because the problem gene is on the X ...