20 eyes (12 women, 8 men) undergoing implantation of anterior chamber phakic IOL (PIOL) for correction of the refractive error were examined before and 1 and 6months after surgery.Median of preoperative spherical equivalent of refraction was -9.75 D (range -19.00 to -6.00 D). Contrast sensitivity (CS) was tested on acomputerized systemof theContrastsensitivity 8010 type in6 spatial frequencies (range 0.74 to 29.55 c/deg) and using the Ginsburg’s charts also in 6 spatial frequencies (range 1.15 to 27.25 c/deg), the best corrected visual acuity (BCVA) was measured on the normalized charts with Landolt rings, influence of glare of 342 cd/m2 was examined using Brightness Acuity Tester. At 6 months postoperatively, median of spherical equivalent of refraction was 0.00 (-1.00 to 0.00). BCVA increased from0.79 (range 0.50 to 0.97) preoperatively onto 0.96 (range 0.83 to1.00). Median of CS increased in all spatial frequencies tested using both methods, significantly in the middle and high frequencies and CS almost, reached lower border of CS normal range. Glare had only nonsignificant influence on bothBCVA and CS. Quality of vision postoperatively improved significantly.

        Key words: phakic IOL, high myopia, contrast sensitivity, logMAR charts, glare