A rare eye condition where a person is born with little to no iris (the colored part of the eye), causing vision problems and light sensitivity.
From Greek 'an-' (without) + 'iris' (the eye's colored circle) + '-ia' (medical condition suffix). The term was formalized in medical literature in the late 19th century to describe this congenital absence.
Aniridia teaches us that even tiny structures we don't think about—like the iris that controls light—are absolutely essential, and humans can adapt remarkably when they're missing!
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