[Comparative clinical study of the standard lasik operation versus optimized ORK "Corwave" keratoablation (a...

The efficiency of primary ORK "Corwave" versus LASIK operation was evaluated. Studies were conducted in 2 groups: 1) 12 patients (34 eyes) with bilateral ORK "Corwave" (a study group); 2) 18 patients (36 years) undergone bilateral LASIK by the conventional technology (a control group). The following parameters: uncorrected visual acuity, values of refraction 1 and 3 months after surgery; high-order aberrations (values of RMS coma, spherical aberrations, RMS HOA of orders 3 to 6), spatial contrast sensitivity, blindness sensitivity, questionnaire data on visual comfort, were studied for comparative evaluation of the results of eximer laser correction made by different technologies. In the acuity of vision and in the accuracy of correction of refractive disorders, the clinical and functional results following the optimized correction by the "Corwave" technology were comparable with those after standard laser operations. After ORK "Corwave", spatial contrast sensitivity was found to tend to improve at average and high frequencies. After optimized ablation, the increase in high-order aberrations was less than that after traditional LASIK in terms of all three analyzed parameters; however, this difference was statistically insignificant. The questionnaire test for visual comfort revealed that ORK was effective in overcoming the characteristic optical problems: visual disorders were detected in fewer cases after optimized correction.