DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Pterygium growth (centre left) on a 56-year-old man's eye. A pterygium is a benign growth of the conjunctiva, the membrane covering the front of the eye. As here, it often grows inwards from the nasal side of the nose. If it reaches the cornea, at the centre of the eye, it will need to be surgically removed. For this eye after surgery, see M155/553.
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