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Conductive Keratoplasty and Laser Thermal Keratoplasty

Recent innovations in refractive surgery technology have emphasized the reshaping of the cornea through nonincisional and nonlamellar methods to achieve controlled, accurate, and reproducible refractive effects. Unlike those with excimer laser ablative procedures, such as photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK), many potentially vision-threatening complications can be minimized by avoiding surgical manipulation of the visual axis and by preserving (not ablating or removing) corneal tissue. This chapter will review the principles, clinical results, and applications of using these new noninvasive refractive surgery modalities that promote collagen fiber shrinkage within the peripheral cornea in evolving procedures labeled laser thermal keratoplasty (LTK) and conductive keratoplasty (CK).