David Bowie has a condition called anisocoria, which is the medical term
for unequal pupils. In 1962, aged 14, he got punched in the eye by his
schoolfriend George Underwood, during an argument over a girl named
Carol Goldsmith. George’s fingernail caught David’s eye and dislodged
something. David was admitted to Farnborough Hospital, where it was
found that the sphincter muscles of his left eye were badly torn and he
underwent two eye operations. He has an enlarged pupil that remains permanently open, giving them an unusual appearance. Contrary to popular belief David doesn’t have two different coloured eyes – they are both the same colour. The enlarged pupil only gives the “effect” of two different coloured eyes.