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Lisa Chen, Edward E Manche; Photorefractive keratectomy for residual refractive error in pseudophakic patients. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):3930.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate the outcomes of photorefractive keratectomy (PRK) for residual refractive error in pseudophakic eyes.
In this retrospective case series, nine eyes of eight pseudophakic patients underwent wavefront-guided PRK surgery for residual refractive error. Safety, efficacy, and wavefront outcomes were evaluated.
This is an ongoing study. Results for the eight eyes with at least three months of follow-up are presented below. These data will be updated prior to the meeting.<br /> <br /> Three months after PRK, 75% (n=6) of eyes had an uncorrected distance visual acuity (UDVA) of 20/40 or better and 25% (n=2) had an UDVA of 20/25 or better. All eyes achieved an UDVA of 20/60 or better. Three eyes gained one or more lines of best-corrected distance visual acuity (CDVA). No eyes lost any lines of CDVA. 87.5% (n=7) of eyes were within +/-1.00 diopter (D) of emmetropia, and 87.5% (n=7) of eyes were within +/-1.00 D cylinder. The average spherical equivalent went from -0.781 (range -2.5 to +0.625, standard deviation (SD) 1.045) preoperatively to -0.47 (-0.75 to -0.13, SD 0.25) postoperatively. There was a similar decrease in average cylinder from 1.56 (0.25-3.75, SD 1.14) preoperatively to 0.69 (0-1.75, SD 0.5) postoperatively. Wavefront analyses revealed an overall reduction in total higher-order aberrations from a mean preoperative RMS error of 0.37 (0.11-0.73, SD 0.17) to 0.26 (0.08-0.59, SD 0.16) postoperatively. Average coma, trefoil, and spherical aberration were also reduced from preoperative values of 0.19 (0.05-0.42, SD 0.13), 0.21 (0.02-0.47, SD 0.15), and 0.06 (-0.16 to 0.22, SD 0.11) to postoperative values of 0.14 (0.02-0.52, SD 0.16), 0.11 (0.03-0.24, SD 0.08), 0.01 (-0.11 to 0.17, SD 0.09), respectively. There were no intraoperative or postoperative complications. No eyes developed corneal haze postoperatively.
Wavefront-guided PRK was safe and effective in the treatment of residual refractive error in pseudophakic eyes.
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