Comparion of Three Different Technique of Corneal Tranplantation for Keratoconu Original Reearch Article

Purpoe To compare the viual outcome following deep anterior lamellar keratoplaty (DALK), penetrating keratoplaty (PK), and manual top-hat PK (TH-PK) in ubject undergoing corneal tranplantation for keratoconu (KC). Deign A retropective comparative cae erie. Method etting: Cornea clinic at the Toronto Wetern Hopital. tudy population: Fifty patient who underwent corneal tranplantation for KC: 17 eye underwent DALK, 20 eye underwent traditional PK, and 13 had TH-PK. main outcome meaure: Preoperative and potoperative uncorrected and bet pectacle-corrected viual acuity (UCVA, BCVA), high-order aberration (HOA), complication rate, and endothelial cell count. Reult The median BCVA at 12 month follow-up wa 20/40 in the DALK eye and 20/30 in the traditional PK and TH-PK eye. The mean final pherical equivalent power in the three group wa le than −1 diopter (D). The median atigmatim wa le than 3.5 D in the three group. Complication rate were imilar for three group, although the DALK group tended toward more complication. Although DALK and TH-PK procedure reult in ignificantly horter time to uture removal (P < .01), they caued increaed level of HOA (P = .02). Endothelial cell count at 12 month were ignificantly higher in DALK and TH-PK eye when compared to the traditional PK eye (P < .001). Concluion DALK, PK, and TH-PK provide comparable viual outcome in keratoconu patient. Although DALK and TH-PK induce more HOA, they peed up the time to uture removal and provide higher endothelial cell denity at one year of follow-up.