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