Atypical X-Linked Achromatopsia
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 condition, most red (L) and green (M) ...
Rx Eye & Vision Care (A – Z)
Cone Monochromatism
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 people. Because only one cone type ...
Retinal Cone Dystrophy Type 3B
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 needed for sharp central vision and colour ...
Cone Dystrophy with Supernormal Scotopic Electroretinogram
Cone dystrophy with supernormal scotopic electroretinogram is a rare, inherited eye disease that mainly damages the cone cells in the retina, and later also affects the rod cells. In this disease, ...
Cone Dystrophy with Supernormal Rod Electroretinogram
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 the center of the eye. People slowly lose ...
Cone Dystrophy with Supernormal Rod Response (CDSRR)
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 the rod cells also become abnormal over ...
Chorioretinopathy Syndrome
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 under the retina). In these problems, the ...
Macular Atrophy-Chorioretinopathy Syndrome
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 under it (the choroid) do not develop in ...
Colobomatous Optic Disc-Macular Atrophy-Chorioretinopathy Syndrome
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 eye (optic disc) has a deep defect ...
Coloboma of the Optic Papilla
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, pale area at the back of the eye where ...
Coloboma of the Optic Nerve
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 present from birth. It happens because the ...
Congenital Coloboma of the Macula Lutea
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 the macula, which is the sharp-vision ...
Coloboma of the Macula
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 small central part of the retina that ...
Coloboma of the Choroid and Retina
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 piece or “gap” in the retina (the ...
Nodular Unilateral Glaucoma
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 by a “nodule” or lump inside or around ...
Cogan-Reese Syndrome
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 angle of the eye. It belongs to a group ...
Cerebroretinal Microangiopathy with Calcifications and Cysts
Cerebroretinal microangiopathy with calcifications and cysts is a very rare inherited disease that mainly damages the tiny blood vessels in the brain and the back of the eye (the retina). It causes ...
Choroiditis
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 and helps it stay healthy. When the ...
Tapetochoroidal Dystrophy
Tapetochoroidal dystrophy is another name that has been used for choroideremia, an inherited eye disease that slowly damages the light-sensing retina and the layer under it (the retinal pigment ...
Choroideremia
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 chromosome. In this disease, three important eye ...
