Ocular albinism in Adult
OA is mainly caused by GPR143 gene mutations on the X chromosome, a gene providing instructions for making a protein responsible for eye and skin pigmentation. Rarely, OA is not caused by mutations in the GPR143 gene. In these specific cases, the cause of the condition has yet to be identified.
OA1 is inherited in an X-linked, autosomal recessive pattern. The classic clinical presenting signs and symptoms of OA1 are more common in males, while female carriers manifest few traits of the disease.
Clinical presentation typically includes a patient presenting with impaired visual acuity, stereoscopic vision, and photophobia. Other associated ocular symptoms include rapid, involuntary eye movements (nystagmus) and eyes that do not look in the same direction (strabismus). Many patients have abnormalities involving the optic nerves. Unlike other types of albinism, OA does not greatly affect skin and hair color. However, individuals with OA typically have a slightly lighter complexion than other family members.
E70.318 – Other ocular albinism
26399002 – Ocular albinism
Differential Diagnosis & Pitfalls