Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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Keratectomy
Keratectomy:
Removal of part of the cornea. This can be done by surgical
excision or by
laser. One such laser procedure is PRK (photorefractive
keratectomy).