Light-adjustable IOLs provide stable outcomes

Light-adjustable intraocular lenses (IOLs) provide near-emmetropic refractive outcomes and good uncorrected distance visual acuity that remains stable over time, according to a study published in the Journal of Cataract and Refractive Surgery.

Researchers at University Hospital Virgen de la Arrixaca, Murcia, Spain, performed a prospective non-randomized clinical trial of 53 eyes in 49 patients that had been implanted with a light-adjustable IOL. The researchers used spatial intensity profiles to correct refractive errors in the eyes, and estimated the effective changes in the IOLs' refraction after every treatment by subtracting those in the whole eye and the cornea.

After every light treatment and at 3-, 6- and 12-months, the researchers measured the refractive changes in the whole eye, refractive changes in the IOL, manifest refraction and visual acuity.

A maximum change in spherical power of the light-adjustable IOL of between −1.98 D and +2.30 D was induced by the combination of 2 light adjustments. In astigmatism the maximum change was up to −2.68 D. Axis errors were below 9 degrees. A small myopic shift of +0.01 to +0.57 D was produced by the 2 'lock-in' procedures.

To read an abstract of the study, click here.