EyeWorld Asia-Pacific June 2013 Issue

30 EWAP CAtArACt/IOL June 2013 Lens prototype could avert negative dysphotopsia by Erin L. Boyle EyeWorld Senior Staff Writer New patent pending for anti-dysphotopic IOL A fter considerable research on the origins and prevention of negative dysphotopsia (ND), a physician has a patent application pending for a prototype posterior chamber IOL that could assist in negating the post-cataract surgery phenomenon. “The project is going forward,” said Samuel Masket, MD , clinical professor of ophthalmology, Jules Stein Eye Institute, David Geffen School of Medicine, University of California, Los Angeles, Calif., Masket anti-dysphotopic IOL design in cross section from patent application. Note that the circle 6C identifies an annular groove on the peripheral portion of the anterior surface of the optic. The groove receives the anterior capsulotomy, allowing the rim of the optic to overhang the anterior capsule edge. Scanning EM of haptic–optic junction of Morcher prototype anti-dysphotopic IOL. Note the peripheral groove. Morcher prototype anti-dysphotopic IOL in pig eye following femtosecond laser-assisted anterior capsulorhexis Side view of Morcher prototype anti-dysphotopic IOL OCT view of in situ Morcher prototype anti-dysphotopic IOL in pig eye following femtosecond laser-assisted anterior capsulorhexis with Catalys laser. Note the capture of anterior capsule in the peripheral groove. Source (all): Samuel Masket, MD USA. “We’ve written the theories, we’ve talked about our clinical experience, and now I have designed a lens that will hopefully preclude the symptoms. It’s the next step.” Dr. Masket has been published on the topic, investigating how and why patients might have ND. The lens is part of his research, incorporating all that he has learned as he has examined the topic. research In a July 2011 article that Drs. Masket and Fram published in the Journal of Cataract and Refractive Surgery , they examined