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E. Fu, R.R. Krueger, M. Chalita; Alcon Custom Cornea Wavefront–Guided Retreatment After Laser in situ Keratomileusis . Invest. Ophthalmol. Vis. Sci. 2006;47(13):549.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate the outcome of wavefront–guided laser in situ keratomileusis (LASIK) retreatment in patients who had prior myopic LASIK using conventional (nonwavefront) software.
Forty–four eyes of 38 patients who underwent wavefront–guided LASIK retreatment with Alcon CustomCornea (Alcon Laboratories Inc, Fort Worth, TX) were evaluated. Complete ophthalmologic examination, corneal topography, and wavefront measurements were performed. Uncorrected visual acuity (UCVA), best spectacle–corrected visual acuity (BSCVA), manifest refraction, and wavefront analysis were evaluated preoperatively, 1 week, 3 months, and 6 months after surgery. Wavefront measurements were assessed using the LADARWave device. Statistical analysis was performed using the McNemar test and percentage of success.
One week postoperatively, UCVA was >=20/40 in 91% of eyes (>=20/20 in 31%) and BSCVA was >=20/40 in 100% (>=20/20 in 61%). Three months postopratively, UCVA was >=20/40 in 89% of eyes (>=20/20 in 35%) and BSCVA was >=20/40 in 100% (>=20/20 in 71%). Six months postopratively, UCVA was >=20/40 in 91% of eyes (>=20/20 in 33%) and BSCVA was >=20/40 in 100% (>=20/20 in 73%). At each followup, wavefront analysis showed greater than 50% reduction of defocus, astigmatism, coma, spherical aberration, and horizontal trefoil. Overcorrection most often occurred in trefoil, secondary astigmatism, and quadrafoil.
Wavefront–guided retreatment following conventional LASIK is effective in reducing total and high–order aberrations. Care must be taken to avoid overcorrection when treating patients with higher amounts of total aberration.
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