Use of large optical zones with the LADARVision laser for myopia and myopic astigmatism.
OBJECTIVE
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.


METHODS
A retrospective noncomparative interventional case series.


METHODS
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.


METHODS
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.
Nepomuceno
Richard L
RL
Boxer Wachler Vision Institute, 465 N. Roxbury Drive, Suite 902, Beverly Hills, CA 90210, USA.
Boxer Wachler
Brian S
BS
Sato
Michelle
M
Scruggs
Ryan
R
D000293:Adolescent; D000328:Adult; D000368:Aged; D001251:Astigmatism / Q000601:surgery*; D015350:Contrast Sensitivity / Q000502:physiology; D003319:Corneal Stroma / Q000601:surgery*; D005139:Eyeglasses; D005260:Female; D006801:Humans; D007431:Intraoperative Complications; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D011183:Postoperative Complications; D012189:Retrospective Studies; D012449:Safety; D013524:Surgical Flaps; D014792:Visual Acuity / Q000502:physiology