Excimer Laser Can Help Correct Post-LASIK Residual Refractive Error

Patient on an eye surgery
The technology was deemed safe for LASIK retreatment, researchers say.

This article is part of Ophthalmology Advisor’s conference coverage from the 2021 meeting of American Society of Cataract and Refractive Surgery (ASCRS), held in Las Vegas from July 23 to 27, 2021. The team at Ophthalmology Advisor will be reporting on a variety of research presented by the cataract and refractive surgery experts at ASCRS. Check back for more from the ASCRS 2021 Meeting.


There are several techniques for retreating patients who have undergone LASIK surgery. During American Society of Cataract and Refractive Surgery (ASCRS) 2021 meeting in Las Vegas, David TC Lin, MD, FRCS, shared his team’s findings using topography-guided photorefractive keratectomy (TG-PRK) with Schwind Amaris 1050 excimer laser

embedded with Smartsurface technology. They conclude that this approach is a safe and effective treatment for post-LASIK residual refractive error. 

In a retrospective serial case series, researchers evaluated eyes with a post-LASIK residual refractive error that underwent treatment with the Schwind Amaris 1050 excimer laser. Preoperative and postoperative uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction (MR) and topographies were analyzed after 6 months of follow-up.

The research found 75 patients had sufficient data at 6 months for analysis. A total of 33 patients (44%) showed that UDVA ≥20/40 preoperatively improved to 61 (81%) postoperatively. Additionally, 62 patients (83%) had no change or improved CDVA, while 3 (4%) lost 2 or more lines. Mean spherical equivalent improved from -0.93±1.84 D to -0.22±1.04 D, while mean astigmatism decreased from 0.97±1.11 D to 0.50±0.73 D.

Disclosure: Multiple study authors declared affiliations with the biotech, pharmaceutical, and/or device companies, including Schwind Amaris. Please see the original reference for a full list of authors’ disclosures.  

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Lin D, Holland S, Hamroush A, Mosquera S. Topography-guided photorefractive keratectomy for retreatment on post-LASIK refractive error. Paper presented at: 2021 ASCRS Annual Meeting; July 2021; Las Vegas, NV. Paper 76451.