Reading performance after implantation of a small-aperture corneal inlay for the surgical correction of presbyopia: Two-year follow-up.

Abstract

PURPOSE:

To evaluate the change in reading-performance parameters after implantation of the Kamra small-aperture intracorneal inlay over a 2-year follow-up.

SETTING:

University Eye Clinic, Paracelsus Medical University, Salzburg, Austria.

DESIGN:

Cohort study.

METHODS:

This study comprised naturally emmetropic presbyopic patients. Bilateral reading acuity, reading distance, reading speed, and the smallest log-scaled sentence were evaluated in a standardized testing procedure using the Salzburg Reading Desk. The minimum postoperative follow-up was 24 months.

RESULTS:

The study enrolled 32 patients. The reading desk results showed a significant improvement in each parameter tested. After a mean follow-up of 24.2 months ± 0.8 (SD), the mean reading distance changed from the preoperative value of 48.1 ± 5.5 cm to 38.9 ± 6.3 cm (P < .0001), the mean reading acuity at best distance improved from 0.3 ± 0.14 logRAD to 0.24 ± 0.11 logRAD (P < .000001), and the mean reading speed increased from 142 ± 13 words per minute (wpm) to 149 ± 17 wpm (P=.029). One patient lost 1 line, and 1 patient had no change. The improvement was up to 6 log-scaled lines (mean improvement 2.7 ± 1.6 lines) in the other 30 patients.

CONCLUSIONS:

After implantation of the small-aperture intracorneal inlay, there was an improvement in all tested reading performance parameters in emmetropic presbyopic patients; the improvement was the result of an increased depth of field. These 2-year results indicate that the inlay is an effective treatment for presbyopia.

• Authors: Alois K Dexl, Orang Seyeddain, Wolfgang Riha, Melchior Hohensinn, Wolfgang Hitzl, Günther Grabner
• Journal: Journal of cataract and refractive surgery (J Cataract Refract Surg) Vol. 37 Issue 3 Pg. 525-31 (Mar 2011) ISSN: 1873-4502 [Electronic] United States
• PMID: 21262559 (Publication Type: Clinical Trial, Journal Article, Multicenter Study)
• Copyright: Copyright © 2011 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.

Topics

• Corneal Stroma (physiopathology, surgery)
• Depth Perception (physiology)
• Female
• Follow-Up Studies
• Humans
• Male
• Middle Aged
• Presbyopia (physiopathology, surgery)
• Prospective Studies
• Prostheses and Implants
• Prosthesis Implantation
• Reading
• Surgical Flaps
• Treatment Outcome
• Visual Acuity (physiology)