[JinHamasaki]

Well, here are my 2 cents.

First of all, look at the "A Song for ××" cover and especially the ayu-mi-x Acoustic Orchestra side. Notice that one of her lateral eye is slightly larger than the other. (Lateral is Ayu's right). I don't think she would have surgery to make one eye bigger than the other (and if there was a mistake, she would have gotten it fixed a long time ago lol). It is very common for a certain body part to be larger than the other. Check your fingers everyone! Although ayu having surgery is not a big deal. There are some other factors:

The use of makeup can make your eye look significantly different. She wore a lot less makeup back then. She probably also improved the way she modeled. I mean, after 100 magazine shoots, I'd hope she would get better XD.

Oh, and btw, you don't notice the difference in eye sizes later, such as in "LOVEppears" cover, but then again she is squinting. In "SEASONS" her eye look close enough in size. Whether it was makeup or surgery, I don't know XD.