title: Use of large optical zones with the LADARVision laser for myopia and myopic astigmatism.
abstract: 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.
authors.affiliation: Boxer Wachler Vision Institute, 465 N. Roxbury Drive, Suite 902, Beverly Hills, CA 90210, USA.
authors.forename: Richard L
authors.initials: RL
authors.lastname: Nepomuceno
authors.forename: Brian S
authors.initials: BS
authors.lastname: Boxer Wachler
authors.forename: Michelle
authors.initials: M
authors.lastname: Sato
authors.forename: Ryan
authors.initials: R
authors.lastname: Scruggs
mesh_terms: 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