Wavefront-Optimized LASIK and PRK in Patients With High Astigmatism
To compare efficacy of wavefront-optimized LASIK and PRK in patients with baseline cylinder of 2.00 or greater.
In this retrospective study, 31 eyes of 22 patients with a baseline cylinder of 2.00 or greater underwent wavefront-optimized LASIK or PRK with Alcon Wavelight Allegretto Eye-Q 400 excimer laser. All eyes were targeted for emmetropic vision.
Six months after LASIK, 10 eyes failed to follow up. Of the remaining, 8/11 had uncorrected distance visual acuity (UDVA) of 20/40 or better and 5/11 had 20/25 or better. 2 eyes gained one or more lines of best-corrected distance visual acuity (CDVA). Mean preop spherical equivalent decreased from -4.51+/-2.53 diopters (range –8.0 to 2.5) to -0.89+/-0.56 (-1.75 to 0). Mean cylinder decreased from 3.61+/-1.03 diopters (2.00 to 5.25) to 0.27+/-0.24 (0 to 0.5). Six months after PRK, 9/10 eyes achieved 20/40 UDVA or better and 7/10 achieved 20/25 or better. 4 eyes gained one or more lines of CDVA. Mean preop spherical equivalent decreased from -2.76+/-4.02 diopters (range -9.75 to 3.63) to -0.09+/-0.54 (-0.88 to 0.75). Mean cylinder decreased from 3.48+/-0.88 diopters (2.00 to 5.25) to 0.68 +/-0.43 (0 to 1.25).
Both LASIK and PRK are effective in eyes with high baseline cylinder.