Midrasch zu Wajikra 21:18

5) (Vayikra 21:18) ("For every man who has in him a blemish shall not come near: a man who is blind, or lame, or charum or asymmetrical of limb.") "every man who has in him a blemish": What is the intent of this? Because it is written (Vayikra 21:21) "the seed of Aaron," I might think that the halachah applied to his seed only. Whence do I derive that it applies (also) to Aaron himself? From "For every man." This tells me only of a permanent blemish. Whence do I derive the same for a passing blemish? From "every man who has in him a blemish."

6) "blind": whether he is blind in both eyes or only in one. Whence is it derived that white spots on the cornea or constant watery occlusion (are also considered blemishes)? From "a man who is blind" (i.e., though the impairment in vision is due not to the eye itself, but to some mal-functioning of the man.")

7) "lame": whether he is lame in both legs or only in one. Whence is it derived that if his foot is arched and curved in the shape of a scythe (this is also considered a blemish)? From "or lame" (connoting extension of inclusion). "charum": one whose nose is sunken in. Whence do I derive that noses which are fore-shortened, fused at the nostrils, or cadent (i.e., falling beneath the lip) (are also considered blemishes)? From "or charum."