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LTK: (Laser Thermal Keratoplasty)

Definition
Refractive surgery that corrects for hyperopia

Procedure
LTK uses a holmium (YAG) laser to burn the cornea in
a circumferential fashion.  The resulting contraction
of the cornea, steepens the central portion of the cornea,
causing the cornea to correct small amounts of hyperopia.

Uses
Persons with hyperopia ranging between +0.75 -> +2.75 can benefit from LTK.  Ideal candidates have less than .75D of astigmatism.    The procedure is often used to fix over-corrections after Lasik or PRK.