Laser-assisted in situ keratomileusis with optimized, fast-repetition and cyclotorsion control excimer laser to treat hyperopic astigmatism with high cylinder

Session Details

Session Title: LASIK Outcomes and Refinements

Session Date/Time: Monday 09/10/2017 | 14:30-15:50

Paper Time: 14:36

Venue: Room 4.4

First Author: : J.Alió del Barrio SPAIN

Co Author(s): :    J. Alio   M. Tiveron Jr   A. Plaza-Puche              

Abstract Details

Purpose:

To evaluate the visual outcomes after femtosecond laser assisted laser in situ keratomileusis (LASIK) surgery to correct primary simple or compound hyperopic astigmatism with high cylinder performed using a fast-repetition-rate excimer laser platform with optimized aspheric profiles and cyclotorsion control. To the best of our knowledge, very limited evidence is currently available regarding the outcomes in the treatment of this uncommon refractive error.

Setting:

-Cornea, Cataract and Refractive Surgery Unit, Vissum Corporación, Alicante, Spain. -Division of Ophthalmology, Universidad Miguel Hernández, Alicante, Spain

Methods:

Observational retrospective consecutive nonrandomized noncomparative case series of eyes with primary simple or compound hyperopic astigmatism and a cylinder power ≥ 3.00 diopters (D) that had uneventful femtosecond laser assisted LASIK with a fast-repetition-rate excimer laser ablation, aspheric profiles and cyclotorsion control. 80 eyes at 3 months and 50 eyes at 6 months were enrolled. Visual, refractive, and aberrometric results were evaluated at the 3 and 6-month follow-up. The astigmatic outcomes were evaluated using the Alpins method and ASSORT software.

Results:

The significant reduction in refractive sphere and cylinder 3 and 6 months postoperatively (P<0.01) was associated with an improved uncorrected distance visual acuity (P<0.01). 23.75% required a retreatment 3 months after surgery. Efficacy and safety indices at 6 months were 0.90 and 1.00, respectively. At 6 months, 80% of eyes had an SE within ±0.50D and 96% within ±1.00D. No significant differences were detected between the 3d and the 6th postoperative months in refractive parameters. A significant increase in the spherical aberration was detected, but not in the coma.. The correction index was 0.94 at 3 months.

Conclusions:

Laser in situ keratomileusis for primary compound hyperopic astigmatism with high cylinder (>3.00 D) using the latest excimer platforms with cyclotorsion control, fast-repetition-rate and optimized aspheric profiles is safe, effective, and predictable. The observed results are comparable to those already published by our group for the treatment of the myopic and mixed astigmatisms associated with high cylinder power using the same technology and treatment protocols.

Financial Disclosure:

NONE