Implantable collamer lens effective for correcting myopia

(HealthDay)—Implantable collamer lens (ICL) implantation is effective for correcting myopia, according to a study published online Dec. 12 in Clinical & Experimental Ophthalmology.

Jong S. Lee, M.D., Ph.D., from the Pusan National University in South Korea, and colleagues conducted a retrospective observational study involving 281 eyes of 145 myopic patients. Patients underwent ICL implantation and were followed for at least five years (87 ± 18.9 months).

The researchers found that the final mean LogMAR uncorrected and corrected distance visual acuities were 0.02 ± 0.19 and −0.12 ± 0.13, respectively. The mean efficacy index was 1.04 ± 0.32 and the mean safety index was 1.20 ± 0.26. There was a decrease in the mean spherical equivalent from −8.74 ± 2.27 diopters (D) to −0.58 ± 0.72 D. High predictability was noted, with 69.8 and 87.2 percent having a postoperative refraction within 0.5 and 1.0 D, respectively. There was a change in the mean postoperative vault from 2.53 ± 0.6 to 2.00 ± 0.7. Cataract developed in 2.1 percent of eyes, with mean endothelial cell loss of 7.8 ± 8.3 percent. Overall, 0.7 percent of eyes had increased intraocular pressure that required exchange of lenses with different sizes.

"ICL implantation to correct myopia was an effective and safe surgery with high predictability and stability during long-term follow-up," the authors write. "Slight myopic shift and cataract formation related with change in vault should be further evaluated."

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