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Promising preliminary results in study of Light Adjustable Lens
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ATHENS — The Calhoun Light Adjustable Lens is showing high predictability, stability of results and optimal capability for myopic, hyperopic and astigmatic adjustment, as shown by a study presented at the ESCRS Winter Refractive Surgery Meeting here.
The surgical procedure is no different from standard IOL implantation, although the present model requires a 2.2-mm to 2.5-mm incision and the use of forceps. The only special requirement is the use of a light filter during implantation to protect the light-sensitive surface of the lens.
"After 1 week, during which the patient should wear protective glasses, the lens can undergo refractive adjustment. If the patient is satisfied, the 'lock-in' procedure can be performed 2 days later, otherwise two or three further adjustments can be attempted," said José Güell, MD.
According to the preliminary results of the first four patients implanted with the Light Adjustable Lens in Barcelona, an improvement in uncorrected visual acuity was obtained in all cases, with a precise adjustment of the spherical error.
"More than 90% of the eyes were within 0.25 D of intended correction, and all of them were within 0.5 D," he said. No loss of best corrected visual acuity was reported.
Early results of astigmatic correction in five patients are equally promising, according to Dr. Güell.
"We are now working on the possibility of producing multifocal changes on this lens and on the simultaneous, customized removal of aberrations during the light adjustment procedure," Dr. Güell said.
With these improvements and the development of an injectable model, "no other technology will be able to compete with this IOL in the future," he said.