Visual performance after implantable collamer lens implantation and wavefront-guided laser in situ keratomileusis for high myopia.
OBJECTIVE
To compare postoperative visual function after implantable collamer lens (ICL; STAAR Surgical, Nidau, Switzerland) implantation and after wavefront-guided laser in situ keratomileusis (WFG-LASIK) in eyes with high myopia.


METHODS
Retrospective, observational case study.


METHODS
We investigated 46 eyes of 33 patients undergoing ICL implantation and 47 eyes of 29 patients undergoing WFG-LASIK (Technolas217z; Bausch & Lomb, Rochester, New York, USA) for the correction of high myopia (manifest spherical equivalent < or = -6 diopters). Ocular higher-order aberrations (HOA) and contrast sensitivity (CS) function were measured by Hartmann-Shack aberrometry (KR-9000; Topcon, Tokyo, Japan) and a CS unit (VCTS-6500; Vistech Consultants Inc, Dayton, Ohio, USA) before and 3 months after surgery, respectively. From the CS, the area under the log CS function (AULCSF) was calculated.


RESULTS
For a 4-mm pupil, the changes in ocular coma-like aberrations, spherical-like aberrations, and total HOAs after ICL implantation were significantly less than those after WFG-LASIK (P < .001, Mann-Whitney U test). The postoperative AULCSF was significantly increased after ICL implantation (P < .001), whereas after WFG-LASIK, it was significantly decreased (P < .001).


CONCLUSIONS
ICL implantation induces significantly fewer ocular HOAs than WFG-LASIK. Moreover, CS was improved significantly after ICL implantation, but deteriorated after WFG-LASIK in eyes with high myopia. Thus, in the correction of high myopia, ICL implantation seems to be superior in visual performance to WFG-LASIK, suggesting that it may be a better surgical option for the treatment of such eyes.
Department of Ophthalmology, University of Kitasato School of Medicine, Sagamihara, Kanagawa, Japan.
Akihito
A
Igarashi
Kazutaka
K
Kamiya
Kimiya
K
Shimizu
Mari
M
Komatsu
D000293:Adolescent; D000328:Adult; D015350:Contrast Sensitivity / Q000502:physiology; D019781:Corneal Topography; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D054018:Lasers, Excimer / Q000627:therapeutic use; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D047728:Myopia, Degenerative / Q000601:surgery*; D054120:Phakic Intraocular Lenses; D012029:Refraction, Ocular / Q000502:physiology; D012189:Retrospective Studies; D014792:Visual Acuity / Q000502:physiology*; D055815:Young Adult