Comparison of Visual Outcomes and Higher-order Aberrations Between FS-LASIK and SMI-LIKE for Moderate to High Hyperopia: A 2-Year Result.

Abstract

PURPOSE:

The aim of the study was to evaluate and compare the long-term visual outcomes and higher-order aberrations (HOAs) between femtosecond laser-assisted in situ keratomileusis (FS-LASIK) and small-incision lenticule intrastromal keratoplasty (SMI-LIKE) in the correction of moderate to high hyperopia.

METHODS:

In this study, 16 subjects (20 eyes) underwent FS-LASIK and 7 subjects (10 eyes) underwent SMI-LIKE. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction, mean keratometry (Km), anterior asphericity (Q), and HOAs preoperatively and 2 years postoperatively were obtained in both procedures.

RESULTS:

The efficacy indices of the FS-LASIK group and the SMI-LIKE group were 0.85 ± 0.14 and 0.87 ± 0.17, respectively. The safety indices of the FS-LASIK and SMI-LIKE groups were 0.99 ± 0.15 and 1.08 ± 0.24, respectively. No significant difference in safety index or efficacy index was found between the FS-LASIK and SMI-LIKE groups (all P > 0.05). The correlation coefficient of the attempted versus achieved spherical equivalent postoperatively was 0.69 ( P < 0.01) and 0.89 ( P < 0.01) in the FS-LASIK group and SMI-LIKE groups, respectively. The front Km, negative Q value, negative spherical aberrations (SAs), coma, and total HOAs significantly increased postoperatively in the 2 groups ( P < 0.05). The FS-LASIK group had greater changes in Q value and SA postoperatively than the SMI-LIKE group ( P < 0.01).

CONCLUSIONS:

SMI-LIKE had similar safety and efficacy to FS-LASIK in the correction of moderate to high hyperopia. However, SMI-LIKE may equip better visual quality postoperatively for its lower Q value and SA changes than FS-LASIK.

• Authors: Feng Lin, Shengtao Liu, Dan Fu, Luoli Zhang, Ruoyan Wei, Meiyan Li, Xingtao Zhou
• Journal: Cornea (Cornea) Vol. 42 Issue 12 Pg. 1506-1512 (Dec 01 2023) ISSN: 1536-4798 [Electronic] United States
• PMID: 37099670 (Publication Type: Journal Article)
• Copyright: Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc.

Topics

• Humans
• Keratomileusis, Laser In Situ (methods)
• Hyperopia (surgery)
• Myopia (surgery)
• Corneal Wavefront Aberration
• Lasers, Excimer
• Prospective Studies
• Refraction, Ocular
• Corneal Transplantation
• Surgical Wound (surgery)