Wavefront-guided excimer laser vision correction after multifocal IOL implantation.

Abstract

PURPOSE:

To investigate the use of wavefront-guided LASIK after multifocal intraocular lens (IOL) implantation to correct residual ametropia and higher order aberrations.

METHODS:

In a prospective, nonrandomized case series, wavefront-guided LASIK was performed in 27 eyes (19 patients) after multifocal IOL implantation (Tecnis diffractive IOL, n = 20; ReSTOR diffractive IOL, n = 4; ReZoom refractive IOL, n = 3) using the VISX STAR S4 IR excimer laser. Visual acuity, manifest refraction, and wavefront error were examined pre- and 3 months postoperatively.

RESULTS:

In the Tecnis group, results before (after) LASIK were: sphere +1.06 +/- 0.77 diopters (D) (-0.03 +/- 0.28 D; P = .0001), cylinder -1.13 +/- 0.73 D (-0.14 +/- 0.25 D; P = .00004), distance uncorrected visual acuity (UCVA) 20/45 +/- 0.09 (20/29 +/- 0.16; P = .00004), near UCVA 20/30 +/- 0.24 (20/25 +/- 0.16; P = .001), and higher order aberrations (4-mm pupil) 0.14 +/- 0.05 microm (0.18 +/-0.03 microm; P = .02). Distance and near best spectacle-corrected visual acuity (BSCVA) did not change. In the ReSTOR group, results before (after) LASIK were: sphere +0.75 +/- 0.56 D (+0.13 +/- 0.22 D), cylinder -1.50 +/- 0.47 D (-0.13 +/- 0.22 D), distance UCVA 20/40 +/- 0.07 (20/26 +/- 0.07), near UCVA 20/44 +/- 0.05 (20/25 +/- 0.0), and higher order aberrations (4-mm pupil) 0.14 +/- 0.03 microm (0.20 +/- 0.02 microm). Distance and near BSCVA did not change. In the ReZoom group, results before (after) LASIK were: sphere +0.08 +/- 1.20 D (0.00 D), cylinder -0.83 +/- 0.120 D (0.00 D), distance UCVA 20/40 +/- 0 (20/25 +/- 0), near UCVA 20/60 +/- 0.09 (20/150 +/- 0.18), and higher order aberrations (4-mm pupil) 0.43 +/- 0.04 microm (0.39 +/- 0.03 microm). Patients lost one line of distance BSCVA and two lines of near BSCVA.

CONCLUSIONS:

Wavefront-guided LASIK is safe and effective in diffractive multifocal IOLs to correct residual refractive error, but higher order aberrations did not improve. It is not recommended in refractive multifocal IOLs, as these cannot be measured reliably with current wavefront sensors.

• Authors: Bettina B Jendritza, Michael C Knorz, Steve Morton
• Journal: Journal of refractive surgery (Thorofare, N.J. : 1995) (J Refract Surg) Vol. 24 Issue 3 Pg. 274-9 (03 2008) ISSN: 1081-597X [Print] United States
• PMID: 18416262 (Publication Type: Journal Article)

Topics

• Adult
• Aged
• Corneal Stroma (physiopathology, surgery)
• Corneal Topography
• Female
• Humans
• Keratomileusis, Laser In Situ (methods)
• Lasers, Excimer
• Lens Implantation, Intraocular
• Lenses, Intraocular
• Male
• Middle Aged
• Postoperative Complications
• Prospective Studies
• Prosthesis Design
• Pseudophakia (physiopathology)
• Refraction, Ocular (physiology)
• Refractive Errors (etiology, physiopathology, therapy)
• Surgical Flaps
• Visual Acuity (physiology)