Ocular Aberration Changes After Wavefront-Guided LASEK Surgery
Purpose
To analyse the ocular aberration changes of patients who had wavefront guided LASEK surgery
Methods
From November 2012 to December 2013 , 18 patients ( 36 eyes) who had wavefront guided LASEK surgery included to the study. All eyes were treated with STAR S4 IR excimer laser using the customVue procedure . The iDesign wavefront aberrometer is used for the treatment planning. We did ocular examinations and measured high order aberrations (HOA) with the iDesign aberrometer with 4 mm pupil size preoperatively and one month after the surgery .
Results
Of the 18 patiens, 14 were men and 4 were women. Mean age was 29,7 (19-45). Mean preoperative manifest spherical refractive error was -2,25±1,18 (-3,0-1,50) cylindrical refractive error was -0,76±0,7(-3,0-0,0). The mean preoperative best corrected visual acuity (BCVA) was 1,03±-0,10 (1,0-1,5) and the mean postoperative uncorrected visual acuity (UCVA) was 1,06±-0,13 (1,0-1,5) with Snellen Acuity Chart at one month postoperatively. All eyes had no change or gained at least 1 snellen line . There were not statistically significant differences in HOAs (all zernike coefficients) with respect to preoperative values. Mean preoperative RMS was 0,35±0,13 (0,15-0,78) and postoperative mean RMS was 0,39±0,17 (0,15-0,86)(p=0,17). Mean preoperative spherical aberration was 0,04±0,10 (-0,06-0,43) and mean postoperative spherical aberration was 0,01±0,13 (-1,11-0,55) (p=0,13).
Conclusion
Wavefront guided LASEK surgery is an effective, safe treatment for low myopia and low myopic astigmatisms. lt provides excellent refractive outcomes and does not cause significant increase in HOAs.