Related Experiment Video
Updated: Sep 23, 2026
Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
Published on: September 20, 2024
Use of large optical zones with the LADARVision laser for myopia and myopic astigmatism
Richard L Nepomuceno1, Brian S Boxer Wachler, Michelle Sato
1Boxer Wachler Vision Institute, 465 N. Roxbury Drive, Suite 902, Beverly Hills, CA 90210, USA.
Purpose:
To analyze the visual acuity, contrast sensitivity, and target deviations of patients who underwent laser in situ keratomileusis (LASIK) for spherical and astigmatic myopia with up to 8.0-mm laser optical zones.
Design:
A retrospective noncomparative interventional case series.
Participants:
Three hundred fifty-two eyes of 186 patients in a refractive surgery practice.
Methods:
Chart review of consecutive patients who underwent LASIK for spherical and astigmatic myopia with the Autonomous LADARVision excimer laser.
Main Outcome Measures:
The preoperative and the 3-month postoperative visual acuity and contrast sensitivity, as well as the target deviation, were assessed for each eye. The change in best spectacle-corrected visual acuity (BSCVA), best spectacle-corrected contrast sensitivity (BSCCS), and target deviation were analyzed by size of optical zone.
Results:
For spherical myopes, uncorrected visual acuity (UCVA) was 20/20 or better in 55.7% of eyes. The mean deviation from target was -0.19 +/- 0.64 diopters (D), with 75.3% within +/-0.50 D of the target. None of the eyes lost more than two lines of BSCVA. A loss of three or more patches (levels) of BSCCS was seen in 2.7% of eyes, whereas a loss of four or more patches of BSCCS was seen in 1.1%. For astigmatic myopes, UCVA was 20/20 or better in 61.9% of eyes. The mean deviation from target was -0.17 +/- 0.55 D, with 67.5% within +/-0.50 D of the target. No eye lost more than two lines of BSCVA. A loss of three or more patches of BSCCS was seen in 4.3% of eyes, whereas a loss of four or more patches of BSCCS was seen in 1.2%.
Conclusions:
Larger optical diameters did not adversely affect BSCVA and BSCCS. Postoperative target deviation with the nomogram used was accurate with larger optical zones.
