Why does David Bowie have 2 different colored eyes?

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Tags

1. #coloured
2. #because
3. #permanently
4. #pupil
5. #different
6. #condition
7. #anisocoria
8. #light
9. #bowie
10. #create
11. #unusual
12. #having
13. #fixed
14. #right
15. #while
16. #changes
17. #appearance
18. #dilated
19. #called
20. #instead
21. #illusion
22. #respond