Choroideremia is an inherited condition that causes progressive vision loss. It is far more common in men than in women. The condition causes tissues in the back of the eye, namely the retina, photoreceptors, and choroid (a network of blood vessels that lies between the retina and the white of the eye) to degenerate over time. Night blindness is typically the first symptom, followed by a loss of peripheral vision. These symptoms typically develop before the age of 20, although the rate of degeneration varies greatly from person to person, even among members of the same family.
Eventually the condition affects a person's central vision—essentially what one sees when one looks straight ahead—though this typically doesn't begin until one's 40s or 50s. Some people with choroideremia retain functional central vision into their 70s.
Choroideremia does not affect any other system of the body.
An estimated 1 in 58,000 people have choroideremia. The overwhelming majority of people affected by choroideremia are male.
Treatments for choroideremia largely involve improving the person's nutrition and helping the person cope with visual impairments. Fresh fruits and vegetables, an antioxidant supplement, and omega-3 fatty acids—provided either through supplements or foods such as fish—are often recommended by a physician.
Treatments for vision loss are similar to those recommended for any visually-impaired person. An optometrist can help the person make the most of the remaining vision. Counseling may be helpful to cope with the emotional effects of living with decreased vision.
Choroideremia does not affect a person's lifespan. People can live long, productive lives with choroideremia, albeit with progressive visual impairment.
An all-volunteer non-profit organization for people with choroideremia, their families, and others which pushes for choroideremia research and helps promote a greater understanding of the condition.
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