Related Experiment Video
Updated: Aug 21, 2026
Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
Published on: September 16, 2025
[Results of wavefront-guided LASIK]
T Hammer1, G I W Duncker, S Giessler
1Universitätsklinik und Poliklinik für Augenheilkunde, Martin-Luther-Universität Halle-Wittenberg, Halle.
Background:
Wavefront-guided LASIK procedures provide patients with customized corneal treatments. The computer ablation profiles correct both spherical and/or cylindrical errors of refraction and aberrations up to the fifth order.
Methods:
We performed wavefront-guided LASIK treatments on 62 patients using the Keracor 217 Z. The spherical equivalent was -6.11 +/-2.29 D on the average. Data collected for 3 months were evaluated to determine the predictability, efficacy, stability, and safety of the refractive procedure.
Results:
We found good predictability of the refractive result after correcting -1 to -6 D of myopia. Beyond -7 D there were over- and undercorrections of +/-2 D in 10% of the procedures. A UCVA of 0.8 or better was observed in 53% of the patients 3 months postoperatively, and 75% of the patients reached a BCVA of 0.8 or better. After 3 months 6% lost 2 lines, 22% lost 1 line, 22% of the patients gained 1-2 lines, and BCVA remained unchanged in 55%. The fluctuation of the refraction was about -0.23 D during the first 3 postoperative months.
Conclusions:
The low and middle range of myopia can be corrected very accurately using the wavefront technology. Higher degrees of myopia face both under- and overcorrections. Postoperative refractions become stable very quickly. However, the visual acuity changes even 6 months postoperatively. From our point of view, wavefront correction by LASIK should be more reliable in terms of centration, accuracy, and standardization to get better results.
