Abstract
Purpose: :
To compare pre and postsurgical aberrations in patients postLASIK surgery performed with different microqueratomes.
Methods: :
A prospective, comparative, transversal study was done.We included patients undergoing refractive LASIK surgery with platform Visx S4.We divided the patients in groups depending the microqueratomes used: 1) moria, 2) hansatome and 3) XP. We assessed aberrometry, pupil diameter (PD), spheric equivalent (SE) and visual capacity (VC). Patient evaluation was done prior and 1 month after surgery. We analyzed in aberrometry % higher order aberrations, total (rms), higher order aberrations rms, defocus, astigmatism, coma, trefoil, spheric aberration, SE and PD using Visx VueTM Custome aberrometer. VC was evaluated with Snellen chart and noted in log Mar units for analysis. Statistics were done with SPSS program.
Results: :
We included 102 eyes of 51 patients, 58.8% female, mean age 24.2 years old (20-38). Divided by group 1=34, 2=32 and 3=36 eyes. Before surgery the higher order aberration % in group 1=4.9 (SD 0.8), 2 =10.5 (SD 4.1), 3=4.8 (SD 2.5). The higher order aberration rms 1= 0.3 (SD 0.08), 2 =0.3(SD 0.09), 3=0.4 (SD 0.09) . Defocus 1= 4.7 (SD 1.7), 2 =3 (SD 2.2), 3=6 (SD2.3). Astigmatism 1=2.5 (SD 1.7), 2=2(SD 1.5), 3=1.9(SD 1.4). Coma 1=0.2(SD 0.06), 2=0.2(SD 0.09), 3=0.2 (SD 0.08). Trefoil 1=0.2(SD 0.07), 2=0.2 (SD 0.07), 3=0.2 (SD 0.07).Spheric aberration 1=-0.04(SD0.1), 2=0.1 (SD 0.1), 3=-0.1(SD 0.09).After surgery the higher order aberration % 1=46.2 (SD 17.3), 2 =39 (SD 25), 3=36.7 (SD 11.7). The higher order aberration rms 1= 0.5 (SD 0.1), 2 =0.6 (SD 0.2), 3=0.6 (SD 0.2). Defocus 1=0.05(SD 0.6), 2=2 (SD 1.2 ), 3=0.2 (SD 0.9). Astigmatism 1=0.7 (SD 0.5), 2=0.9(SD 0.5), 3= 0.3 (SD 0.1). Coma 1= 0.2 (SD 0.1), 2 = 0.4 (SD 0.2), 3=0.3(SD 0.2). Trefoil 1= 0.03 (SD 0.1), 2=0.2(SD 0.1), 3= 0.2 (SD 0.09). Spheric aberration 1= 0.02 (SD 0.2), 2 = 0.2 (SD 0.2), 3= 0.2 (SD 0.3 ). Mean PD were 1= 7mm (SD 0.6), 2=7.6mm (SD 1.3), 3= 7.3 mm (SD 0.5). SE before surgery 1= -3.5 (SD 1.3), 2= -3.8 (SD 1.2) and 3= -3.9 (SD 1.9). After surgery 1= -0.06 (SD 0.5), 2= 0.7(SD 0.7), 3=-0.1 (SD 1). The VC before surgery was in 1=1.2(SD 0.1), 2= 0.7(SD 0.3) and 3= 1.2(SD 0.4) log Mar. After surgery 1= 0.05(SD 0.07), 2= 0(SD 0.2), 3=0.2(SD 0.2). Results were evaluated with ANOVA test, and we founded no statistically significant difference by use of the microqueratomes to the induction of higher-order aberrations after surgery.
Conclusions: :
There is not statistically significant difference by use of the microqueratomes to the induction of higher order aberrations after surgery.