Nghiên cứu lâm sàng đã thiết lập sự an toàn và hiệu quả của Ho: YAG LTK lên đến 2 năm sau khi điều trị. LTK cũng có thể được sử dụng để điều trị hyperopia PRK và LASIKinduced. Diode laser có thể giúp cải thiện hơn nữa sự ổn định của hiệu ứng khúc xạ với | 92 Mian and Azar corneal thickness. Clinical studies have established the safety and efficacy of Ho YAG LTK up to 2 years after treatment. LTK may also be used to treat PRK and LASIK-induced hyperopia. Diode lasers may help further improve stability of refractive effect with LTK. Wavefront-guided LTK may further improve the predictability of this procedure and allow for predictable outcomes even for retreatments of initial undercorrections. REFERENCES 1. Lans LJ. Experimentelle Untersuchungen uber Entstehung von Astigmatismus durch nicht-perforirende Corneawunden. Graefes Arch Ophthalmol 1898 45 117-152. 2. Terrien F. Dystrophie marginale symmetrique des deux cornees avec astigmatisme regulier consecutif et guerison par la cauterisation ignee. Arch Ophthalmol Paris 1900 20 12-21. 3. Wray C. Case of 6 D of hypermetropic astigmatism cured by the cautery. Trans Ophthalmol Soc UK 1914 34 109-110. 4. Gassett AR Shaw EL Kaufman HE Itoi M Sakimoto T Ishii Y. Thermokeratoplasty. Trans Am Acad Ophthalmol Otolaryngol 1973 77 OP-441-OP-454. 5. Shaw EL Gassett AR. Thermokeratoplasty TKP temperature profile. Invest Ophthalmol Vis Sci 1974 13 181-186. 6. Keates RH Dingle J. Thermokeratoplasty for keratoconus. Ophthalm Surg 1975 6 89-92. 7. Fogle JA Kenyon KR Stark WJ. Damage to epithelial basement membrane by thermokeratoplasty. Am J Ophthalmol 1977 83 392-401. 8. Aquavella JV Smith RS Shaw EL. Alterations in corneal morphology following thermokeratoplasty. Arch Ophthalmol 1976 94 2082-2085. 9. Arensten JJ Rodrigues MM Laibson PR. Histopathologic changes after thermokeratoplasty for keratoconus. Invest Ophthalmol Vis Sci 1977 16 32-38. 10. Itoi M. Computer phtokeratometry changes following thermokeratoplasty. In Schachar RA Levy NS Schachar L eds. Refractive Modulation of the Cornea. Denison TX LAL Publishers 1981 61-69. 11. Rowsey JJ Doss JD. Preliminary report of Los Alamos Keratoplasty techniques. Ophthalmology 1981 88 755-760. 12. Neumann AC Fyodorov S Sanders DR. Radial .