In LTK or Laser Thermal Keratoplasty, the doctor uses a laser to heat a series of small, dot-shaped areas of the cornea. This causes the corneal tissue to expand and the curvature of the cornea steepens. LTK is used to treat people who are farsighted.

Candidates for LTK should be at least 40 years old, have stable vision and no abnormalities of the cornea or external eye.

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