What Is the 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.

For patients who want their vision evaluated after healing before their final prescription is locked in, the LAL offers a different approach to cataract vision correction. However, it requires several follow-up visits and careful compliance with UV-protective eyewear during the adjustment period.

What Are Cataracts?

Cataracts are typically an age-related condition. They occur when the eye’s normally clear natural lens becomes cloudy, making it increasingly difficult for light to focus properly.

Cataracts are extremely common as people get older. According to the National Eye Institute (NEI), more than half of Americans age 80 or older either have cataracts or have already undergone cataract surgery.

Early cataracts may cause little or no noticeable change. As they progress, patients may experience blurry or hazy vision, faded colors, glare, difficulty seeing at night, sensitivity to light, or double vision.

Age is the most common cause, although diabetes, eye injuries, certain medications, previous eye surgery, and other factors may also increase cataract risk.

How Are Cataracts Treated?

Cataracts don’t always need immediate treatment. Early vision changes may sometimes be managed with updated eyeglasses, brighter lighting, or other adjustments. However, these measures do not remove the cataract itself.

If the cataract develops to the point of disrupting daily activities, laser cataract surgery may be a treatment option. Cataract surgery removes the cloudy natural lens and replaces it with an artificial intraocular lens, or IOL.

One major consideration is the intraocular lens (IOL) you choose to replace your cloudy lens. One of Lake Eye Associates’ premium IOL options is the RxSight Light Adjustable Lens (LAL).

What makes the LAL different is what happens after surgery. Instead of relying solely on preoperative measurements to determine the final focusing power, the lens can be adjusted after your eye has healed and you have experienced your postoperative vision.

If you are comparing surgical approaches and lens options, read our guide on how advanced laser cataract surgery can improve surgical precision and visual planning.

What Symptoms Can Cataracts Cause?

Cataracts often develop gradually, so early changes can be easy to overlook. Comprehensive eye exams can detect lens clouding and help determine whether a cataract or another eye condition is causing your symptoms.

Symptoms that indicate you may be dealing with a cataract include:

• Faded-looking colors
• Lights appear brighter than they are
• Poor night vision
• Cloudy or blurry vision
• Double vision
• Rapidly changing prescription
• Halos surrounding lights

If these symptoms start interfering with reading, driving, work, or other daily activities, your eye doctor can evaluate whether cataract surgery is an option.

How Does Cataract Surgery Work?

If glasses or contacts can’t correct your cataracts, cataract surgery is the only way to remove the cloudy natural lens. During surgery, the cataract is removed, and an artificial IOL is implanted in its place.

The IOL becomes a permanent part of the eye and takes over the natural lens’s focusing role. Different IOL technologies address different visual priorities, which is why choosing a lens is an important part of cataract surgery planning.

Patients specifically considering laser assistance can learn more in our guide to laser cataract surgery and lens choices.

How Does the Light Adjustable Lens Work?

The Light Adjustable Lens (LAL) is a premium IOL option that lets your eye doctor customize and optimize your vision after cataract surgery.

The LAL is implanted in much the same way as another IOL during cataract surgery. Its key difference is that the lens contains photosensitive material that responds to controlled UV light delivered by the RxSight Light Delivery Device (LDD).

After your eye heals, your eye care team measures your vision and discusses your visual goals. If an adjustment is needed, precisely delivered UV light changes the implanted lens’s shape and focusing power. This lets your surgical team refine the prescription using post-healing measurements rather than relying entirely on pre-surgery predictions.

According to RxSight, patients receive between 1 and 3 adjustment treatments depending on the visual result being targeted. Once the desired vision has been reached, 2 final light treatments permanently lock in the lens power.

What Does the LAL Surgery, Healing, and Treatment Process Look Like?

Choosing the LAL means committing not only to cataract surgery but also to a postoperative adjustment process. The exact schedule varies by patient, but the overall journey typically follows these stages:

Stage	What Happens	What to Expect
1. Cataract Evaluation	Your ophthalmologist examines your eyes, measures them, discusses your vision goals, and determines whether the LAL is appropriate.	You discuss your lifestyle, eye health, prescription, astigmatism, and expectations for vision after surgery.
2. Cataract Surgery	The cloudy natural lens is removed, and the RxSight LAL is implanted.	The surgical process is generally similar to cataract surgery with another IOL.
3. Initial Healing	Your eye is allowed to heal before we begin adjustments.	Your vision may change during healing. You must follow postoperative instructions and wear the required RxSight UV-protective glasses.
4. Vision Evaluation	Your eye care team measures your postoperative prescription and discusses how your vision is functioning in everyday life.	These measurements help determine whether and how the lens should be adjusted.
5. Light Adjustments	The Light Delivery Device delivers controlled UV light to alter the lens’s focusing power.	RxSight states that patients receive between 1 and 3 adjustment treatments based on the desired visual outcome.
6. Lock-In Treatments	Once the desired prescription has been reached, 2 final light treatments lock the lens power.	After the final lock-in process and the period your surgical team specifies, the lens can no longer be adjusted.
7. Follow-Up	Your eye care team checks healing and your final vision.	Your doctor will advise whether glasses are still useful for particular activities.

What Should You Expect During Light Treatment?

Your eye doctor performs light treatments in the office using the RxSight Light Delivery Device. Your pupil is dilated, and the device directs a controlled amount of UV light onto the implanted LAL.

RxSight reports that a treatment can last from approximately 8 to 120 seconds, with the average treatment taking about 90 seconds. Adjustment treatments are separated by at least 3 days.

Your vision may appear blurry immediately afterward because of the gel used during treatment and because your pupil has been dilated. Some patients may also notice a temporary pink or red tint to their vision. RxSight notes that it may take approximately 24 hours after a treatment to notice the resulting vision change.

Following each appointment, continue wearing your RxSight UV-protective glasses exactly as directed by your surgical eye care team. These glasses protect the photosensitive lens from unintended UV exposure while you can still make adjustments.

Who Is a Good Candidate for the LAL?

A good LAL candidate is generally someone undergoing cataract surgery who wants to refine their vision after the eye heals and is willing and able to complete the required postoperative appointments and UV-protection protocol.

The LAL may be particularly worth discussing if:

• You value the ability to adjust your prescription after cataract surgery.
• You have astigmatism that needs to be considered as part of your postoperative visual target.
• You have had previous corneal or laser vision surgery, such as LASIK or PRK, which can make IOL power calculations more challenging.
• You can attend multiple light-treatment and follow-up appointments.
• You can wear the required UV-protective glasses consistently until your eye care team confirms the treatment process is complete.

The LAL is not suitable for every patient. Your ophthalmologist must evaluate your overall eye health, medications, medical history, retinal health, and ability to follow postoperative treatment before recommending it.

If your broader question is whether you qualify for laser-assisted cataract surgery, our guide to laser cataract surgery candidacy and lens options explains those considerations in greater detail.

What Do Clinical Results Show About the Light Adjustable Lens?

Clinical data provide useful context for understanding why postoperative adjustability matters. In RxSight’s prospective, controlled multicenter study, 92% of evaluated LAL eyes were within 0.50 diopters of their target refractive result.

RxSight also reports that patients receiving the LAL were about twice as likely to achieve 20/20 uncorrected vision or better at six months than patients receiving the monofocal control lens in its clinical study. Individual outcomes vary, and these statistics should not be interpreted as a guarantee of 20/20 vision or complete freedom from glasses.

The underlying study included 600 randomized patients, with 403 assigned to the LAL group and 197 to a commercially available monofocal IOL group.

How Much Does the Light Adjustable Lens Cost?

The Light Adjustable Lens is a premium IOL, so no single price applies to every patient or practice. Cost varies by eye care practice, geographic location, treatment plan, and included services.

According to RxSight, standard Medicare or insurance typically covers cataract surgery with a basic monofocal lens, while the premium features associated with the LAL generally involve an additional out-of-pocket cost.

Because pricing varies, the best approach is to request a personalized estimate from Lake Eye Associates after your cataract evaluation. The team can explain what is included in your treatment plan, what your insurance may cover, and which premium lens expenses you’re responsible for.

How Does the LAL Compare With Multifocal and Toric Lenses?

No IOL is universally “best.” LAL, multifocal, and toric lenses solve different vision problems and suit different priorities.

IOL Type	Primary Goal	Key Difference	May Be Worth Considering If
Light Adjustable Lens (LAL)	Customized postoperative refractive correction	Lens power can be adjusted after surgery and healing, then permanently locked in	You value postoperative customization and can complete the required light-treatment process
Multifocal Lens	Provides functional vision at multiple distances	Uses optical zones or designs intended to provide more than one focal range	Reducing dependence on glasses across near, intermediate, and distance vision is a priority, and your eyes are suitable for the technology
Toric Lens	Correct corneal astigmatism	Contains astigmatism correction built into the IOL	You have clinically significant corneal astigmatism that your surgeon recommends correcting with a toric IOL

The decision should consider more than independence from glasses. Your corneal measurements, retinal health, previous eye surgery, astigmatism, night-vision needs, lifestyle, and tolerance for different optical characteristics can all influence which lens is appropriate.

For a more detailed comparison specifically between adjustable and multifocal technology, read our guide to the Light Adjustable Lens vs. multifocal lenses.

What Other Intraocular Lens Options Are Available?

At Lake Eye Associates, we proudly offer several IOL technologies in addition to the LAL. Your eye doctor can help determine which lens design fits your eye health and visual goals.

• Accommodating lenses: These lenses provide a range of functional vision by responding to the eye’s focusing mechanisms.
• Multifocal lenses: Multifocal IOLs are designed to provide vision at more than one distance, potentially reducing dependence on glasses for appropriate candidates.
• Monofocal lenses: A monofocal lens will only correct one distance issue. For example, it can target clearer distance vision, although reading glasses or other correction may still be needed for near tasks.
• Extended range lenses: Extended depth of focus lenses are designed to extend the range of clear vision, particularly across distance and intermediate ranges.
• Toric lenses: Toric IOLs are specifically designed to correct corneal astigmatism while also addressing the refractive target selected for cataract surgery.

Key Takeaways

• The Light Adjustable Lens is an IOL that can be adjusted after cataract surgery and initial healing.
• Its photosensitive material responds to controlled UV light delivered through the RxSight Light Delivery Device.
• Patients typically receive 1 to 3 adjustment treatments followed by 2 final lock-in treatments.
• Each light treatment averages approximately 90 seconds, according to RxSight.
• UV-protective eyewear and follow-up appointments are essential parts of the LAL treatment process.
• The LAL may be especially worth discussing for patients who prioritize postoperative customization, including some who have previously undergone laser vision correction.
• The LAL is a premium lens and generally involves additional out-of-pocket costs beyond standard cataract surgery coverage.
• No IOL can guarantee perfect vision or complete freedom from glasses.

What’s Next

Traditional IOL planning requires your surgeon to select the lens power before cataract surgery. The Light Adjustable Lens changes that sequence by letting you refine the prescription after surgery, once your eye has healed and your real-world vision can be evaluated.

That ability makes LAL cataract surgery a compelling option for appropriately selected patients who value postoperative customization. It also requires greater post-surgery commitment, including several treatment visits, UV-protective eyewear, and careful adherence to your surgical team’s instructions.

The best lens is ultimately the one that fits your eye health, prescription, lifestyle, and visual priorities. A comprehensive cataract evaluation can help determine whether LAL, multifocal, toric, monofocal, or another IOL technology best fits your eyes.

How Can You Discuss Your Lens Options With Lake Eye Associates?

If cataracts are affecting your vision, talk to your eye doctor about your IOL options. Lake Eye Associates can evaluate your cataracts, discuss your vision goals, and explain whether the Light Adjustable Lens or another IOL option may be appropriate for you.

If postoperative customization matters to you, ask whether you are a candidate for LAL cataract surgery and what the full adjustment and follow-up process involves.

Contact us at Lake Eye Associates today. Our team can answer your questions or book you for a consultation with an eye care professional near you.

Medical disclaimer: The information provided in this blog is intended for general informational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition.

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