<Li> Pigment dispersion syndrome--a condition characterized by loss of pigmentation from the posterior iris surface which is disseminated intraocularly and deposited on various intraocular structures, including the anterior surface of the iris . </Li> <Li> Sturge--Weber syndrome--a syndrome characterized by a port - wine stain nevus in the distribution of the trigeminal nerve, ipsilateral leptomeningeal angiomas with intracranial calcification and neurologic signs, and angioma of the choroid, often with secondary glaucoma . </Li> <Ul> <Li> Simple heterochromia--a rare condition characterized by the absence of other ocular or systemic problems . The lighter eye is typically regarded as the affected eye as it usually shows iris hypoplasia . It may affect an iris completely or only partially . </Li> <Li> Congenital Horner's syndrome--sometimes inherited, although usually acquired </Li> <Li> Waardenburg syndrome--a syndrome in which heterochromia is expressed as a bilateral iris hypochromia in some cases . A Japanese review of 11 children with albinism found that the condition was present . All had sectoral / partial heterochromia . </Li> <Li> Piebaldism--similar to Waardenburg's syndrome, a rare disorder of melanocyte development characterized by a white forelock and multiple symmetrical hypopigmented or depigmented macules . </Li> <Li> Hirschsprung's disease--a bowel disorder associated with heterochromia in the form of a sector hypochromia . The affected sectors have been shown to have reduced numbers of melanocytes and decreased stromal pigmentation . </Li> <Li> Incontinentia pigmenti </Li> <Li> Parry--Romberg syndrome </Li> </Ul> <Li> Simple heterochromia--a rare condition characterized by the absence of other ocular or systemic problems . The lighter eye is typically regarded as the affected eye as it usually shows iris hypoplasia . It may affect an iris completely or only partially . </Li>

What is it called when an animal has two different colored eyes