Hypoplasia

... (hypochromic).[5] In humans, usually, an excess of melanin indicates hyperplasia of the iris tissues, whereas a lack of melanin indicates hypoplasia. Heterochromia of the eye (heterochromia iridis or heterochromia iridum; the common wrong form "heterochromia iridium" is not correct ...

See entire post

... pp.102-103, as cited in Morris, 1974) some genetic disorders http://www.noah-health.org/en/genetic/ Specific Conditions * Achromatopsia * Adrenal Hypoplasia Congenita * Adrenoleukodystrophy * Aicardi Syndrome * Alagille Syndrome * Albinism/Hypopigmentation * Alexander Disease * Alpers' Disease ...

See entire post