9. Ocular Albinism
There are two different types of albinism: ocular albinism (known as OA) and oculocutaneous (aka OCA). Although both forms can affect the eye, skin, and hair pigmentation, OA usually has an effect on the pigmentation of the eyes, whereas OCA primarily has an effect on the skin.
According to the National Organization for Albinism and Hypopigmentation, the hair and skin of people with ocular albinism “may be slightly lighter than that of the rest of the family members”.
Although albinism is a rare body feature, OA is even rarer. The experts estimate there may be between 1 person in 20,000 and 1 person in 50,000. Ocular albinism doesn’t just affect the color of the iris, but it can also cause sensitivity to light, reduced vision, and other more serious eye conditions.