System may help correct refractive errors, reduce coma after LASIK, study finds

Using ORK-CAM software to perform corneal wavefront-guided enhancements may be effective for correcting second-order refractive errors and reducing the corneal primary coma produced by prior keratorefractive procedures, according to a study published in the February issue of Journal of Cataract & Refractive Surgery.

Ocular Surgery News Europe/Asia-Pacific Edition Editorial Board Chairman Jorge L. Alió, MD, PhD, and colleagues evaluated visual and optical performance progress after performing corneal wavefront-guided LASIK re-treatment on 34 eyes of 29 patients who had primary coma aberration after previous LASIK surgery. The surgeons performed all procedures using ORK-CAM software (Schwind) to calculate the ablation design.

Patients ranged from 26 to 64 years of age, the authors noted.

At 6 months postop, the mean efficacy index was 0.88 and the mean safety index was 1.03.

At 1 month, the researchers observed statistically significant changes in total root mean square reduction (P = .01), primary coma root mean square reduction (P < .01) and negativization of the primary spherical aberration coefficient (P < .01), according to the study.

Also at 1 month, the investigators reported a statistically significant reduction in sphere and cylinder (P < .01).

Of 34 total eyes, 97.06% had a spherical equivalent within ±1 D.

“At 6 months, patient perception of halos and glare was reduced or eliminated in a high percentage of cases,” the researchers said.