Optical Profile Following High Hyperopia Correction With a 500-Hz Excimer Laser System.

Abstract

PURPOSE:

To evaluate corneal higher order aberrations after LASIK for the correction of high hyperopia using a 500-Hz excimer laser and optimized ablation profile.

METHODS:

Retrospective consecutive study including 51 eyes of 28 patients (age range: 21 to 54 years) with high hyperopia or hyperopic astigmatism (sphere ≥ 5.00 diopters). All cases underwent LASIK using the sixth generation Amaris excimer laser (SCHWIND eye-tech-solutions, Kleinostheim, Germany) and a femtosecond laser platform for flap creation. Postoperative changes in corneal higher order aberrations for the 4-, 5-, and 6-mm pupil diameters and corneal asphericity for 4.5 and 8 mm were represented at the end of the 6-month follow-up.

RESULTS:

A significant increase in corneal root mean square higher order, spherical, and coma aberrations was observed 6 months after surgery (P < .01). Corneal asphericity for the 4.5-mm (Q45) and 8-mm (Q8) corneal diameter also changed significantly during the postoperative period (P < .01). Strehl ratio change was not statistically significant (P = .77).

CONCLUSIONS:

Correction of high hyperopia with LASIK significantly induces corneal higher order aberrations regardless of the physiologic level of photopic and mesopic pupil conditions.

• Authors: Ana B Plaza-Puche, Amr El Aswad, Samuel Arba-Mosquera, Dominika Wróbel-Dudzinska, Ahmed A Abdou, Jorge L Alió
• Journal: Journal of refractive surgery (Thorofare, N.J. : 1995) (J Refract Surg) Vol. 32 Issue 1 Pg. 6-13 (Jan 2016) ISSN: 1938-2391 [Electronic] United States
• PMID: 26812708 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright 2016, SLACK Incorporated.

Topics

• Adult
• Cornea (physiopathology)
• Corneal Pachymetry
• Corneal Topography
• Corneal Wavefront Aberration (etiology, physiopathology)
• Female
• Follow-Up Studies
• Humans
• Hyperopia (physiopathology, surgery)
• Keratomileusis, Laser In Situ (methods)
• Lasers, Excimer (therapeutic use)
• Male
• Middle Aged
• Postoperative Complications
• Refraction, Ocular (physiology)
• Reoperation
• Retrospective Studies
• Visual Acuity (physiology)
• Young Adult