High Hyperopic Lasik With Reduction Of Corneal Prolateness To Control Induced Spherical Aberration

To evaluate the visual outcomes of young high hyperopic patient’s LASIK, using customized centration and corneal aspherization to control the induced spherical aberration. 

Hopital Fondation Adolphe de Rothschild

Prospective interventional study of consecutive high to extreme hyperopes (≥+3D of Spherical Equivalent SE) undergoing a LASIK with the WaveLight FS200 femtosecond and EX500 excimer laser platforms. An aspheric ablation profile (planned change in corneal asphericity ΔQ = +0.2) was delivered using the Custom-Q nomogram (Alcon Laboratories, Inc., Fort Worth, TX) on an optical zone of diameter ≥ 6.5mm centered near the corneal vertex. Uncorrected and best-corrected distance visual acuity (UDVA-BDVA), as well as changes in SE, corneal asphericity (ΔQ) and Higher order aberrations (HOAs), were analyzed preoperatively and on day1, months 1, 3, 6, and 12

117 eyes of 63 patients, (mean age of 30.1 ± 5.6 years), were included. Preoperatively and at 12 months postoperatively, the mean SE was 5.1 ± 1.1 D and 0.00 ± 0.7 D, respectively. 88% of eyes achieved 0 Log Mar or better UDVA at 12 months. One month after the surgery, there was a statistically significant induction of positive spherical aberration that decreased progressively and significantly at the last visit (Preop SA4 = 0.09 ± 0.11 µm, D1 SA4 = 0.30 ± 0.32 µm, M12 SA4 = 0.08 ± 0.21 µm, p=0.056). Two eyes needed enhancement at 12 months

LASIK for high levels of hyperopia showed good outcomes. These are mainly due to an aspheric-customized ablation profile with a change of ΔQ = +0.2 in corneal asphericity