Wavefront-guided ablation retreatment using Iris registration

Engy M. Mohamed, Orkun Muftuoglu, Robert W Bowman, Harrison D Cavanagh, Venkateswara Mootha, Gamal A. Radwan, James P McCulley

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Purpose: To evaluate the efficacy, predictability, safety, and intraoperative and postoperative complications of laser in situ keratomileusis (LASIK) retreatment in myopic eyes using wavefront-guided ablation with iris registration (IR). Methods: Retrospective analysis was used to evaluate wavefront-guided retreatment with IR in a consecutive cohort of 77 eyes (57 patients) after LASIK. The eyes were divided into two groups: no previous retreatment group (group 1) (n = 63) and previous LASIK retreatment group (group 2) (n = 14). The primary outcome variables assessed postoperatively at 1, 3, and 6 months were uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), and pre- and postretreatment changes in manifest refraction. Results: The mean preretreatment spherical equivalent in group 1 was reduced from -0.5 ± 1.0 diopter (D) (range -3 to 2.4) to 0.06 ± 0.3 (range -0.9 to 0.6) (P < 0.002) at 6 months. In group 2, the mean preretreatment spherical equivalent was reduced from -0.9 ± 1.24D (range -3.1 to -0.5) to 0.04 ± 0.5 (range -1.0 to 1.1) (P < 0.049) at 6 months. At 6 months, UCVA was 20/20 or better in 92% in group 1 and 64% in group 2, of patients, respectively. No eyes lost more than one line of BCVA in group 1 and one eye (7%) lost two lines of BCVA in group 2. Conclusions: Wavefront-guided LASIK retreatment with IR after LASIK is an effective, predictable, and safe procedure in cases requiring a single retreatment. In contrast, eyes with previous retreatments showed less predictability and lower percentage of eyes with postoperative 20/20 UCVA.

Original languageEnglish (US)
Pages (from-to)54-59
Number of pages6
JournalEye and Contact Lens
Volume36
Issue number1
DOIs
StatePublished - Jan 2010

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Retreatment
Iris
Laser In Situ Keratomileusis
Visual Acuity
Intraoperative Complications
Safety

Keywords

  • Guided LASIK retreatment
  • Wavefront

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Wavefront-guided ablation retreatment using Iris registration. / Mohamed, Engy M.; Muftuoglu, Orkun; Bowman, Robert W; Cavanagh, Harrison D; Mootha, Venkateswara; Radwan, Gamal A.; McCulley, James P.

In: Eye and Contact Lens, Vol. 36, No. 1, 01.2010, p. 54-59.

Research output: Contribution to journalArticle

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abstract = "Purpose: To evaluate the efficacy, predictability, safety, and intraoperative and postoperative complications of laser in situ keratomileusis (LASIK) retreatment in myopic eyes using wavefront-guided ablation with iris registration (IR). Methods: Retrospective analysis was used to evaluate wavefront-guided retreatment with IR in a consecutive cohort of 77 eyes (57 patients) after LASIK. The eyes were divided into two groups: no previous retreatment group (group 1) (n = 63) and previous LASIK retreatment group (group 2) (n = 14). The primary outcome variables assessed postoperatively at 1, 3, and 6 months were uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), and pre- and postretreatment changes in manifest refraction. Results: The mean preretreatment spherical equivalent in group 1 was reduced from -0.5 ± 1.0 diopter (D) (range -3 to 2.4) to 0.06 ± 0.3 (range -0.9 to 0.6) (P < 0.002) at 6 months. In group 2, the mean preretreatment spherical equivalent was reduced from -0.9 ± 1.24D (range -3.1 to -0.5) to 0.04 ± 0.5 (range -1.0 to 1.1) (P < 0.049) at 6 months. At 6 months, UCVA was 20/20 or better in 92{\%} in group 1 and 64{\%} in group 2, of patients, respectively. No eyes lost more than one line of BCVA in group 1 and one eye (7{\%}) lost two lines of BCVA in group 2. Conclusions: Wavefront-guided LASIK retreatment with IR after LASIK is an effective, predictable, and safe procedure in cases requiring a single retreatment. In contrast, eyes with previous retreatments showed less predictability and lower percentage of eyes with postoperative 20/20 UCVA.",
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