+0.50 - +1.75 +2.00 - +3.00 +3.25 - +5.00   Pre post   Pre post   Pre post     Mean ± SD Mean ± SD P-value Mean ± SD Mean ± SD P-value Mean ± SD Mean ± SD P-value Spherical aberration 0.13±0.10 0.14±0.13 0.90 0.10±0.09 0.26±0.18 0.005 0.24±0.19 0.40±0.18 0.02 Coma 0.22±0.16 0.29±0.18 0.073 0.23±0.12 0.35±0.17 0.012 0.24±0.13 0.66±0.21 <0.01 Trefoil 0.22±0.10 0.24±0.16 0.781 0.17±0.09 0.19±0.09 0.491 0.18±0.09 0.24±0.13 0.224 2nd astigmatism 0.08±0.05 0.29±0.14 <0.01 0.05±0.02 0.12±0.08 0.003 0.08±0.03 0.16±0.08 0.006 Quadrafoil 0.05±0.03 0.07±0.04 0.09 0.08±0.03 0.09±0.05 0.521 0.07±0.03 0.11±o.o5 0.023 Pentafoil 0.04±0.02 0.04±0.02 0.590 0.03±0.01 0.07±0.03 <0.01 0.04±0.03 0.07±0.03 0.029 HOAs 0.39±0.15 0.55±0.22 0.005 0.35±0.10 0.55±0.18 0.001 0.44±0.19 0.88±0.20 <0.01 Total aberrations 3.38±0.93 1.89±0.85 <0.01 3.25±0.76 1.82±0.66 <0.01 5.15±0.96 3.14±1.36 <0.01 Pre= Preoperative Post= Postoperative

Table 2: The distribution of the mean RMS of aberrations before and after wave-front LASEK surgery on hyperopic and hyperopic astigmatism patients in the three groups of (+0.50 - +1.75), (+2.00 - +3.00) and (+3.25 - +5.00).