A coloboma is believed to be genetic and can be passed along in families.
Sometimes a coloboma is part of a genetic syndrome. For instance, cat eye syndrome, a rare disorder named after the distinctive shape of an iris coloboma, is caused by a specific genetic mutation and occurs along with other physical abnormalities.
However, not all babies born with a coloboma have a family history of this condition, suggesting that the disorder can appear by chance.
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