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First Author: G.Rocha CANADA
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To explain the mechanism of action of the light-adjustable lens (LAL) and detail postoperative results in a series of 28 patients implanted with this intraocular lens implant (IOL).
Private practice. GRMC Vision Centre, U of Manitoba, U of Ottawa, Brandon, Manitoba, Canada
The light-adjustable lens (LAL, Calhoun Vision, Pasadena, CA) is a proprietary silicone lens that contains photosensitive material enabling the refractive adjustment of the power of the lens following implantation. Refractive adjustments of up to 2 D for sphere and cylinder are done using the companys Light Delivery Device. Patients included in the series presented here underwent planned cataract extraction with LAL implantation and then postoperative adjustment of the refractive correction as per the companys treatment algorithms. Mean absolute error (MAE) to target, manifest refractive spherical equivalent (MRSE) and residual cylinder were evaluated.
The MAE following implantation was 0.89 D ḟ0.55, while at the final lock-in the MAE was 0.14 D ḟ0.16. Prior to adjustments, 21.4% (N=6) of eyes were within 0.25 D of the intended refraction, which increased to 89.3% (N=25) following final lock-in; 32% (N=9) of eyes were within 0.50 D pre-adjustment, which improved to 96.4% (N=27) following final lock-in, and; 67.9% (N=20) of eyes were within 0.75 D pre-adjustment, improving to 100% (N=28) following the final lock-in. The cylindrical correction showed similar trends with 100% (N=28) of eyes with <0.50 D of residual cylinder following the final lock-in.
The LAL provides predictable outcomes, enabling patients to achieve excellent visual acuity through accurate correction of defocus and astigmatism. The lens is particularly useful in astigmats and post-refractive cataract patients.
... receives consulting fees, retainer, or contract payments from a competing company