The key to the procedure is a specially tuned laser that destroys the natural brown pigment melanin in the iris, the eye's central colored portion.
手术的关键是一种特殊的调谐激光器，它可以破坏虹膜(眼睛中部有颜色的部位)内天然的“褐色素”内的黑色素。
The brown pigment of loquat nut is natural and pigment.
枇杷果核棕色素是一种天然色素。
The brown pigment of loquat nut is natural and safe pigment.
枇杷果核棕色素是一种天然色素。
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