ABSTRACT
To determine the outcomes of visual correction with femto-LASIK following PK. In this prospective study, 34 eyes of 31 patient who had undergone thin - flap lasik due to high efractive error after corneal grafting were evaluated .After complete ocular examination and assessment of uncorrected and corrected distant visual acuity [UCVA and BCVA], the patients underwent femto-lasik using the Ziemer femto-LDV with 100 micron flap thickness. After 3 to 19 [10.14 +/- 4.81] months of follow-up, mean UCVA increased from 1.5 Log MAR preoperatively [5/100] to 0.3 LogMAR [5/10] postoperatively [P<0.05]. Mean BCVA also increased from 0.3 LogMAR [5/10] to 0.1 LogMAR [8/10] [P<0.05]. Mean spherical equivalent changed from -6.98 +/- 3.87 to -2.18 +/- 2.69 and mean of defocus equivalent also decreased from 10.32 +/- 3.74 preoperatively to 4.13 +/- 2.93 postoperatively [P<0.05 for both]. No significant intraoperative and postoperative complications occurred. Femto-LASIK surgery after penetrating keratoplasty is a successful procedure for correction of moderate to high refractive errors. It seems to be clinically safe, effective and predictable