1. 110 myopes undergoiyng photorefractive keratectomy (PRK) with refraction from - 0,25 D to -12,0 D were divided into 4 groups: A: upto -2.75 D, B: -3.0 D to -5.75 D, C: -6.0 D to -8,75 D and D: -9.0 D to -12,0 D. BCVA using the computerized method with Landolt rings and CS using an adjustment method with ascendent and descendent approach to treshold contrast adaptation on a computerized system of the Contrast sensitivity 8010 type were examined in patients before and 1 year after PRK. 20 emmetropes of the same median age were evaluated as a control group. 2. Preoperative BCVA and CS in myopes of all four groups was significantly lower (p < 0,05 až p < 0,001), compared to controls. Decrease of functions was proportional to refraction. 3. With increasing refraction less patients were within ±0,5 D and ±1,0 D after surgery. 4. Twelve months after PRK, BCVA in the group A reached the level of controls, CS in the same time interval was equal to control even in groups A and B. 5. According to results of our study, PRK is a suitable method for myopia upto -6.0 D.

        Key words: photorefractive keratectomy, myopia, contrast sensitivity, logMAR charts.