LASIK eye surgery

LASIK eye surgery

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Credit: BO VEISLAND/SCIENCE PHOTO LIBRARY

Caption: Laser eye surgery. Artwork showing three stages of LASIK laser eye surgery for astigmatism. The eye is seen from above. Astigmatism is caused by a cornea (blue, left) that is not perfectly spherical. The non-uniform curvature means that light rays do not all come to a single focus point on the retina (back of eye). This can be repaired by LASIK eye surgery. A flap is cut in the cornea (top) using a special knife called a microkeratome. An excimer laser (middle) is then used to remove some tissue from the corneal stroma (pink). The flap is replaced and heals without stitches in a couple of weeks. This procedure can also be used to treat nearsightedness (myopia) and farsightedness (hyperopia).

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Keywords: artwork, aspherical, astigmatism, cornea, corneal flap, correcting, correction, eye, human body, illustration, laser, lasik surgery, medical, medicine, microkeratome, operating, ophthalmology, opthalmics, opthalmology, refractive surgery, repair, repairing, surgery, surgical, three, trio, visual defect

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