関連ワード:  why are people's eyeballs yellow    why are some people's eyeballs yellow    why are some people's eyes yellow    why are some people's eyes yellow instead of white    why are old people's eyes yellow    why are some people's sclera yellow    why are some black people's eyes yellowish    why are the whites of people's eyes yellow    why are people born with yellow eyes    why are some people's eyes more yellow