MATT MEADOWS / SCIENCE PHOTO LIBRARY MATT MEADOWS / SCIENCE PHOTO LIBRARY
Laser eye surgery. Surgeon anaesthetising a patient's eyes before LASIK surgery. LASIK (laser-assisted in situ keratomileusis) is a type of refractive laser eye surgery that corrects a condition called astigmatism. A laser (not seen) is used to correct blurred vision caused by an irregular curvature of the cornea or lens. It is also used to correct myopia (short-sightedness) and hyperopia (long- sightedness). Anaesthetic drops are used to numb the eye before a flap of the cornea is cut open to allow the laser to be used.
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