Comparison of Corrected and Uncorrected Distance Visual Acuity After Adjustment and Lock-in Using UV-Light-Adjustable IOL

Monday, April 20, 2015: 3:06 PM
Room 5B (San Diego Convention Center)
James D. Lehmann, MD

The aim of this study was to compare the postoperative UCVA and BCVA of patients who underwent cataract surgery with Light Adjustable Lens (LAL: Calhoun Vision)

This is a prospective study of 46 patients undergoing cataract surgery at our clinical site as part of the FDA trial involving the LAL.  The main trial is a prospective, randomized study comparing BCVA and UCVA of patients with 0.75-2.00D of corneal astigmatism implanted with the LAL versus a control IOL.  This study involves the arm of the study in which patients received the LAL.   These patients received an adjustment to the IOL via UV light approximately 3 weeks after surgery to correct residual spherical error and astigmatism. Typically the first adjustment is followed by an optional second adjustment, and then two treatments to “lock-in” the lens power. The goal was to reduce all residual astigmatism to ≤ 0.50D.

At one week post “lock-in” 2 (approximately 1 month after surgery), UCVA was within one line of BCVA in 100% of  27 LAL subjects. These results also demonstrate stability over a period of 9-months.

The ability to adjust the LAL based on the postoperative residual refraction allows me to maximize vision in my cataract patients, including those with 0.75 – 2.00 diopters of corneal astigmatism.