David Bowie has a condition called anisocoria, which is the medical term for unequal pupils. At he got punched in the eye by his schoolfriend, which caused his pupil to remain permanently open. Some people think his irises are two different colors.
Image result for the many faces of david bowie album
The relationship that inspired one of Bowie's biggest hits: David Bowie pictured in 1969 at Clareville Grove, South Kensington house of Hermione Farthingale - now Hermione Frankel - who was the muse for Life On Mars