الفهرس 
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Abstract
This study included 200 patients (400 eyes) divided into two groups, one group was treated with wavefront optimized ablation and the second group was treated with custom Q.
An eye tracker system was used intraoperatively. For the follow up plan, the patients were examined on 7, 30, and 90 days postoperatively. During each visit, the following was evaluated
1. Uncorrected visual acuity (UCV A).
2. Best spectacle corrected visual acuity (BSCVA).
3. Manifest refraction, both subjective and objective.
4. Slit-lamp biomicroscopy.
5. Corneal topography.
The following postoperative results were attained:
The mean BSCVA in the WFO group at one week postoperatively was 0.897±0.153 in the first group, and 0.992±0.131 in the second group with p- value = 0.02 which is statistically significant.
After one month, the postoperative BSCV A showed improvement in both groups as there were 41(20.50%) patients in the first group gained one line, and 52 (26%) patients in the second group gained additional line and this remained the same after 3 months.
As for predictability, It is evaluated by comparing the achieved postoperative manifest refraction with the attempted correction. As emmetropia was targeted in all cases of the study, the deviation of spherical equivalent from 0.00 is the parameter used for evaluation of predictability.
In the first group: the predictability at one week was 95.50%, but after one month it became 96.50% when there was improvement in the MRSE towards emmetropia and remained stable after 3 months.
one month when there was improvemen in the MRSE towards emmetropia and remained.