Early Clinical Outcomes of Wavefront-Guided Myopic LASIK Treatments Using a New-Generation Hartmann-Shack Aberrometer

Schallhorn, Steven MD
Brown, Mitch OD
Venter, Jan MD
Teenan, David FRCS(Ed), FRCOphth
Hettinger, Keith MS
Yamamoto, Hiromi BS

From the University of California–San Francisco, San Francisco, California (SS); and Optical Express, Glasgow, United Kingdom (SS, MB, JV, DT, KH, HY).

Dr. Schallhorn is a consultant for Abbott Medical Optics and Global Medical Director for Optical Express. The remaining authors have no financial or proprietary interest in the materials presented herein.

Correspondence: Steven Schallhorn, MD, 11730 Caminito Prenticia, San Diego, CA 92131. E-mail: [email protected]

Received May 28, 2013

Accepted August 05, 2013

Journal of Refractive Surgery 30(1):p 14-21, January 01, 2014. | DOI: 10.3928/1081597X-20131029-02

PURPOSE:

To provide an initial retrospective evaluation of early postoperative outcomes after wavefront-guided myopic LASIK using a new-generation Hartmann-Shack wavefront sensor.

METHODS:

A noncomparative, retrospective study of 243 eyes of 126 patients that underwent primary wavefront-guided LASIK, using wavefront data obtained with a new Hartmann-Shack aberrometer (iDesign Advanced WaveScan aberrometer; Abbott Medical Optics, Inc., Santa Ana, CA). Visual acuity, refraction, and patient satisfaction were evaluated 1 month after surgery.

RESULTS:

The manifest spherical equivalent was reduced from −3.28 ± 1.79 diopters (D) (range: −9.88 to −0.38 D) before surgery to −0.03 ± 0.29 D (range: −1.00 to +1.25 D) 1 month after surgery. The manifest spherical equivalent was within 0.50 and 1.00 D of target in 93.0% and 99.6% of eyes, respectively. Manifest astigmatism preoperatively (−0.72 ± 0.67 [range: 0.0 to −5.00 D]) was reduced to −0.14 ± 0.20 (range: 0.0 to −1.00 D) at 1 month and the vector-derived correction ratio (surgically induced refractive change/intended refractive correction) was 1.02 ± 0.30. Uncorrected distance visual acuity of 20/16, 20/20, and 20/25 or better was achieved in 79.0%, 93.4%, and 96.7% of eyes, respectively. No eyes lost two or more lines of corrected distance visual acuity, whereas a gain of one or more lines was observed in 14.0%. Most patients (98.5%) reported that they were satisfied with the outcome of their procedure.

CONCLUSIONS:

Wavefront-guided LASIK using the new aberrometer in this retrospective evaluation was effective, safe, and predictable in the early postoperative time period for the correction of myopia with high patient satisfaction.

[J Refract Surg. 2014;30(1):14–21.]