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Related Experiment Video

Updated: Jan 9, 2026

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
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Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

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Ray-tracing-guided FS-LASIK Using Mi Optimized Strategies.

Shimin Tan1, Yimeng Fan1, Xindi Wang1

  • 1From the Department of Ophthalmology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.

Journal of Refractive Surgery (Thorofare, N.J. : 1995)
|December 10, 2025
PubMed
Summary
This summary is machine-generated.

Ray-tracing-guided femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) provides excellent outcomes for myopia correction. This customized surgery is safe and effective, even for patients with significant refractive differences.

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Area of Science:

  • Ophthalmology
  • Refractive Surgery
  • Laser Vision Correction

Background:

  • Accurate refractive correction is crucial for successful laser vision correction procedures.
  • Discrepancies between subjective and wavefront refractions can pose challenges in achieving optimal outcomes.
  • Femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) offers advanced customization in refractive surgery.

Purpose of the Study:

  • To evaluate the clinical outcomes of ray-tracing-guided FS-LASIK.
  • To assess the efficacy and safety in patients with a refractive difference >0.50 D between subjective and wavefront measurements.
  • To determine the predictability and visual acuity results following this customized approach.

Main Methods:

  • Retrospective analysis of 80 eyes from 45 patients undergoing ray-tracing-guided FS-LASIK.
  • Wavefront refraction measured using InnovEyes sightmap.
  • Customized ablation profiles based on ray-tracing calculations and optimized strategies.

Main Results:

  • High uncorrected visual acuity (UDVA) of 20/20 achieved in 98% of eyes.
  • Mean UDVA was -0.08 ± 0.05 logMAR; no eyes experienced worse corrected distance visual acuity (CDVA).
  • Excellent refractive predictability with 99% of eyes within 1.00 D SEQ and 88% within 0.25 D astigmatism.

Conclusions:

  • Ray-tracing-guided FS-LASIK demonstrates superior outcomes for myopia correction.
  • The procedure is effective, safe, and predictable for eyes with significant refractive differences.
  • This customized surgery expands the potential patient pool for successful refractive correction.