Can the Light Adjustable Lens be changed after cataract surgery?

Yes. That is the defining feature of the LAL. After the eye heals, controlled UV light treatments can change the implanted lens's focusing power. Once you and your surgical eye care team are satisfied with the result, final treatments permanently lock in the prescription.

How many light treatments will I need after LAL cataract surgery?

According to RxSight, patients receive between 1 and 3 adjustment treatments based on their visual goals and results, followed by 2 final lock-in treatments. The exact number of appointments needed can vary.

Why do I have to wear UV-protective glasses after receiving the LAL?

The LAL remains sensitive to UV light until the adjustment process is complete and the lens power is locked. The provided UV-protective glasses help prevent environmental UV exposure from causing uncontrolled changes to the lens. Follow your surgical team’s specific instructions about when and how long to wear them.

Can the Light Adjustable Lens correct astigmatism?

The LAL can be adjusted to address refractive error, including eligible amounts of astigmatism. Whether it is the right approach for your astigmatism depends on your measurements, eye health, and treatment goals.

Will I still need glasses after getting a Light Adjustable Lens?

The LAL is designed to help your surgical team refine your postoperative vision, and clinical data show strong refractive accuracy. However, no lens can guarantee that you will never need glasses. Your final dependence on glasses depends on your visual targets, eye health, healing, and the activities you want to do without corrective lenses.

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What Is the Light Adjustable Lens (LAL)?

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What Is the Light Adjustable Lens (LAL)?

Posted on February 8, 2023 (October 13, 2026) by Lake Eye Associates

A closeup of an eye with an implanted light adjustable lens (LAL).

Reviewed By: Scott R. Wehrly, MD, Board-Certified Laser Cataract & Lens Replacement and Corneal Surgeon

The RxSight Light Adjustable Lens (LAL) is an intraocular lens used during cataract surgery that can be customized after the eye has healed. Unlike conventional IOLs, whose focusing power is selected before surgery, the LAL uses a photosensitive material that lets an eye care professional fine-tune the lens with controlled ultraviolet (UV) light treatments after surgery. This post-surgical adjustability is the defining feature of LAL cataract surgery.