BARRAQUER, BARCELONA, ISM / SCIENCE PHOTO LIBRARY BARRAQUER, BARCELONA, ISM / SCIENCE PHOTO LIBRARY
Corneal graft. Close-up of the left eye of a patient who has undergone corneal transplantation (a corneal graft). The suture thread is visible. This surgical procedure is also known as keratoplasty. The cornea is the transparent front part of the eye, and acts to focus light entering the eye. Corneal transplants are performed when a patient's vision is impaired only by a defect in the cornea.
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