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