J Korean Ophthalmol Soc.  2014 Apr;55(4):480-485.

Higher-Order Aberrations and Visual Acuity with Wavefront-Guided and Wavefront-Optimized Ablation in Laser Keratorefractive Surgery

• Kim SI
• Oh JJ
• Oh TH
• Pak KH
• Baek NH
• Choi JS

Abstract

PURPOSE
To compare higher-order aberrations (HOAs) and visual acuity after wavefront-guided and wavefront-optimized laser keratorefractive surgery.
METHODS
This retrospective study consisted of consecutive cases of eyes that underwent wavefront-guided (VISX S4 CustomVue(R)) or wavefront-optimized (WaveLight(R) EX500) laser assisted in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK). Preoperative and postoperative uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), manifest refraction spherical equivalent (MRSE), and preoperative and 3 month postoperative HOAs were compared.
RESULTS
There were no statistical differences in UCVA, BCVA, MRSE, or total HOAs in either the LASIK and PRK groups (all p > 0.05). Induced amount of spherical aberration (SA) was significantly lower in the wavefront-optimized LASIK and PRK than wavefront-guided LASIK and PRK.
CONCLUSIONS
In laser keratorefractive surgery, wavefront-guided and wavefront-optimized platforms produced equivalent visual outcomes and no differences in total HOAs. However, the wavefront-optimized platform caused less spherical aberration 3 months after operation.

Keyword

Higher-order aberrations; LASIK; PRK; Wavefront-guided; Wavefront-optimized

MeSH Terms

Keratomileusis, Laser In Situ
Photorefractive Keratectomy
Retrospective Studies
Visual Acuity*

Figure

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  Figure 1. Postoperative changes in HOAs by group in LASIK. HOA = higher-order aberration; SA = spherical aberration.

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  Figure 2. Postoperative changes in HOAs by group in PRK. HOA = higher-order aberration; SA = spherical aberration.

Reference

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