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Classic retinitis pigmentosa

Retinitis pigmentosa (RP) is an inherited eye condition that affects the photoreceptor cells responsible for capturing images from the visual field. These cells line the back of the eye in the region known as the retina.

A man looking into an eye examination device

Usher syndrome

Usher syndrome is an inherited condition that affects both hearing and vision. The symptoms of Usher syndrome consist of childhood-onset hearing loss, progressive vision loss caused by degeneration of the retina (retinitis pigmentosa), and sometimes balance problems.

A man looking into an eye examination device

Choroideremia

Choroideremia is a genetic condition that causes progressive vision loss, mostly in males, and is due to degeneration of the specialised light-sensing photoreceptor cells that line the back of the eye.

A man looking into an eye examination device

NARP syndrome

People with NARP (Neuropathy, Ataxia and Retinitis Pigmentosa) syndrome have neurological (muscle weakness, epilepsy and memory problems) and balance problems in addition to retinitis pigmentosa.

A man looking into an eye examination device

Bassen-Kornweig syndrome

In this condition, retinitis pigmentosa is accompanied by progressive neurological problems, abnormal red blood cells (acanthocytosis) and defective bowel absorption of fat, leading to very low blood levels of cholesterol and absent beta lipoprotein (Abetalipoproteinaemia).

Rod-cone dystrophy

Rod-cone dystrophy is an umbrella term used to describe retinal conditions in which the rod-shaped photoreceptors, found mainly in the peripheral areas of the retina, degenerate ahead of the cone-shaped photoreceptors in the centre.

A man looking into an eye examination device

Refsum syndrome

In Refsum syndrome, visual impairment is accompanied by hearing loss, neurological problems, heart problems, dry or flaky skin, loss of sense of smell, and oddly shaped red blood cells.