LCA is a type of inherited retinal condition (with similarities to retinitis pigmentosa). It affects about 1 in 80,000 people and is the most common form of inherited sight loss in children. LCA causes the specialised light-sensing photoreceptor cells at the back of the eye to stop working properly which causes vision loss.
There are at least 20 different forms of LCA (type 1 through to type 20) that have currently been identified. Each type is caused by a defect in a different gene important for normal visual function, these genes include RPE65 (LCA 2); AIPL1 (LCA 4); CEP290 (LCA 10) and RDH12 (LCA 13).
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