The highest frequency of<unk>  type IA is in Northern Ireland, with a phenotype frequency of around 1: 10,000. First cousin - marriages accounted for 4.5% of the parents of patients. Additionally, symptoms that could be heterozygous mutations, such as abnormal iris translucency occurred in 70% of the parents and children of individuals affected with this condition. In general, the phenotypical appearance of OCA1A is associated with northern and western Europe. This is because over 50% of OCA1 subjects are Caucasians. OCA1 is also the most common form of<unk>  in China and Japan. The overall frequency is 1: 20,000 people in the world.
Oculocutaneous albinism type I
Ocular albinism type 1
Ocular albinism
Retinoschisis
Lafora disease
Yemenite deaf-blind hypopigmentation syndrome
Danon disease
Hypohidrotic ectodermal dysplasia