A new small-aperture intraocular lens (IOL) extends patients’ depth of focus as well as multifocal IOLs with fewer dysphotopsias, researchers say.
In a prospective, open-label trial, the IC-8 (AcuFocus) improved patients’ uncorrected distance visual acuity (UCDVA) to 20/23, their uncorrected intermediate visual acuity (UCIVA) to 20/24 and their near visual acuity to 20/30 in the implanted eyes.
“The IC-8 IOL is a great lens that is highly versatile,” said Burkhard Dick, MD, chairman, University Eye Hospital Bochum, Germany, and principal investigator of a prospective, open-label trial of the lens published in the July 2017 issue of the Journal of Cataract & Refractive Surgery.
“The pinhole only allows central focused light to reach the retina and blocks peripheral defocused light that degrades image quality,” Dr. Dick added. “This results in a high quality, extended depth of focus without blurry transition zones.”
Hydrophobic acrylic PC IOL
The IC-8 is a one-piece hydrophobic acrylic posterior chamber IOL with an optic that contains an embedded mask with a 1.36-mm central aperture. The dimensions of the mask and aperture contained within the optic are based on that of the Kamra corneal inlay (AcuFocus), with a smaller diameter and flatter radius of curvature to account for its more posterior placement within the eye.
The lens has a CE Mark and is available in some European and Asia Pacific markets. The company plans to start a U.S. clinical trial in 2018.
The small-aperture lens will compete with multi-focal and trifocal IOLs. These lenses provide good functional vision, but with the drawbacks of reduced contrast, visual disturbances and noncontinuous range of vision.
To test the small-aperture lens, Dr. Dick and his colleagues implanted it in 1 eye of 114 patients, while implanting the fellow eyes with a variety of aspheric monofocal IOLs.