Small-aperture IOL offers advantages over other presbyopia lenses
A new small-aperture intraocular lens (IOL) extends patients’ depth of focus as well as multifocal IOLs with fewer dysphotopsias, researchers say.
Reviewed by Burkhard Dick, MD
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
“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.
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