Results of higher power toric intraocular lens implantation.

Abstract

PURPOSE:

To evaluate the efficacy, predictability, and safety of coaxial microincision phacoemulsification and toric intraocular lens (IOL) implantation in eyes with high corneal astigmatism.

SETTING:

Two eye clinics in Germany.

DESIGN:

Case series.

METHODS:

Routine cataract extraction using 2.2 mm coaxial phaco equipment and Acrysof toric IOL (3.00 to 6.00 diopters [D] cylinder) implantation were performed. Examinations included optical biometry, Haigis IOL calculation, topography, and objective and subjective refractions. Retroillumination images were used to evaluate IOL alignment. Postoperative examinations were scheduled at 1 week and 3 months.

RESULTS:

The study enrolled 40 eyes (30 patients). The mean preoperative keratometric cylinder was 3.55 ± 0.73 D (range 2.64 to 5.39 D) and the mean 3-month postoperative subjective cylinder, 0.67 ± 0.32 D. The mean logMAR uncorrected distance visual acuity improved from 0.93 to 0.20 and the mean logMAR CDVA, from 0.41 to 0.09. The mean prediction error (spherical equivalent) was +0.14 ± 0.44 D. The mean IOL rotation between 1 week and 3 months was 0.23 ± 1.9 degrees clockwise. The mean surgically induced astigmatism was 0.08 ± 0.41 D. The alignment error was below 10 degrees in 97.5% of cases. The mean vector change in refractive cylinder between 1 week and 3 months was 0.31 ± 0.19 D. The Alpins correction index was +1.01, indicating a slight tendency toward overcorrection.

CONCLUSIONS:

Coaxial microincision phacoemulsification with toric IOL safely and predictably reduced high corneal astigmatism and improved surgical outcomes. Thorough planning and precise execution are necessary.

• Authors: Peter C Hoffmann, Sebastian Auel, Werner W Hütz
• Journal: Journal of cataract and refractive surgery (J Cataract Refract Surg) Vol. 37 Issue 8 Pg. 1411-8 (Aug 2011) ISSN: 1873-4502 [Electronic] United States
• PMID: 21703818 (Publication Type: Journal Article, Multicenter Study)
• Copyright: Copyright © 2011 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.

Chemical References

• Acrylic Resins

Topics

• Acrylic Resins
• Adult
• Aged
• Aged, 80 and over
• Astigmatism (complications, physiopathology, surgery)
• Cataract (complications, physiopathology)
• Corneal Topography
• Female
• Follow-Up Studies
• Humans
• Lens Implantation, Intraocular
• Lenses, Intraocular
• Male
• Microsurgery
• Middle Aged
• Ophthalmoscopy
• Phacoemulsification
• Prospective Studies
• Pseudophakia (physiopathology)
• Refraction, Ocular (physiology)
• Treatment Outcome
• Visual Acuity (physiology)