Light Adjustable Lenses and Their Use in Cataract Surgery

If you’ve been diagnosed with cataracts, you’ve probably heard that cataract surgery means getting a new lens implanted in your eye. What you may not know is that not all of those replacement lenses are the same — and one option in particular is changing what’s possible for patients who want the most precise vision correction available after eye surgery. 

Light Adjustable Lenses, or LALs, are a relatively new technology that allows your eye doctor to fine-tune your vision after your cataract surgery is complete. For patients who want the best possible visual outcome, they can be an excellent choice after discussing options with their eye care provider. 

Want to know more? Let’s take a closer look. 

Understanding Intraocular Lenses (IOLs) in Cataract Surgery 

During cataract surgery, your eye’s clouded natural lens is removed and replaced with a clear artificial one called an intraocular lens, or IOL. This lens takes over the focusing job your natural lens used to perform, and it stays in your eye permanently. 

For decades, the challenge with IOLs has been that surgeons have to select the power of the lens before surgery. That prediction is based on careful measurements, but healing is unpredictable. Some patients end up with a minor residual refractive error that requires glasses or contacts to correct. Others see well at a distance but struggle up close. The lens, once implanted, can’t be changed. 

Light Adjustable Lenses solve that problem. 

What Makes Light Adjustable Lenses Different? 

The Light Adjustable Lens by RxSight is the first and only FDA-approved lens that can be customized after cataract surgery. Instead of locking in a permanent prescription before your eye has had a chance to heal, the LAL gives your surgeon the ability to adjust its power after the fact, and after they can see exactly how your eye has responded to treatment. 

With other lenses, you have to make a lot of decisions about the vision you want before your cataract surgery. Once implanted, those lenses can’t be changed — they’re what’s known as “fixed.” The Light Adjustable Lens, however, is an adjustable lens. 

This means that the only decision you have to make before your surgery is to choose the Light Adjustable Lens. The rest can be made after your surgery, once your eye has healed.  Think of it as being able to test-drive your vision before committing to a final prescription. 

What Do Light Adjustable Lenses Feel Like? 

Once implanted, a Light Adjustable Lens feels just like any other IOL. The surgical technique used to place it is identical to standard cataract surgery, so there’s no additional discomfort from the implant itself. 

It’s normal for vision to be blurry or hazy for a few days while your eye heals. You may also feel mild irritation, which is part of the healing process. Beyond that early recovery period, most patients do not experience significant discomfort, but if you do feel soreness or irritation, it’s typically mild and manageable.  

What Eye Problems Can Light Adjustable Lenses Correct? 

LALs are designed to correct the refractive errors that often remain after cataract surgery, some of which leave patients reaching for glasses more than they’d like. 

The Light Adjustable Lens corrects as low as 0.50 diopters of astigmatism, which is the lowest level approved to be treated. The ability to treat 0.50 D of postoperative cylinder makes it the only IOL in the United States approved to correct this level of vision-altering astigmatism.  

Beyond astigmatism, LALs can also address nearsightedness and farsightedness that persist after surgery. The adjustment range spans from -2.0 to +2.0 diopters of sphere correction, giving your surgeon meaningful flexibility to dial in your prescription based on how your eye actually healed, not how the pre-surgical measurements predicted it would. 

How Are Light Adjustable Lenses Customized After Surgery? 

The customization process begins several weeks after your surgery, once your eye has had time to stabilize. About three weeks after your cataract surgery, you’ll visit your doctor’s office to begin the light treatments to customize your vision. During these visits, you and your doctor work together to achieve the best possible visual outcome based on your needs and lifestyle. 

The adjustments themselves are performed using a specialized instrument called the Light Delivery Device, or LDD. Each adjustment is a UV light treatment performed by the Light Delivery Device that corrects refractive error and dials in optimized vision. 

Depending on your desired visual outcome, you may have one to three light treatments, followed by two “lock-in” treatments to prevent further changes. The entire process, from surgery to final lock-in, typically spans several weeks to a few months. 

What Are the Advantages of Light Adjustable Lenses? 

One of the most significant advantages of the Light Adjustable Lens is the ability to fine-tune your vision based on real-world results rather than pre-surgical estimates alone. Because the lens can be adjusted after surgery, your prescription can be refined once your eye has had time to heal – reducing uncertainty and giving your surgeon the opportunity to target your vision with a high degree of precision. In fact, 92% of eyes achieve results within 0.50 diopters of the target prescription, and patients are approximately two times more likely to achieve 20/20 vision or better without glasses at six months. 

There’s also a meaningful psychological benefit. Rather than waiting anxiously to see how their vision settles, patients with LALs have a collaborative role in the outcome – attending follow-up visits, reporting how their vision is working in their daily life, and actively participating in decisions about the final prescription. For many people, that sense of control makes the overall experience more satisfying. 

Are Light Adjustable Lenses Safe? 

Yes. The FDA approved the RxSight Light Adjustable Lens and Light Delivery Device as the first medical device system that can make small adjustments to an artificial lens’s power after cataract surgery. The approval followed a clinical study of 600 patients evaluating both the safety and effectiveness of the system. 

The UV light used in adjustments is precisely targeted and non-invasive, and the adjustments are performed in an office setting. You may experience mild sensitivity or discomfort, but it is generally well-tolerated.  

That said, LALs aren’t the right fit for every patient. The device is intended for patients who have astigmatism in the cornea before surgery and who do not have macular diseases. Patients with certain other eye conditions, those taking specific medications that increase UV sensitivity, and those who aren’t able to commit to the required follow-up visits may not be good candidates. Your doctor will evaluate your full eye health history before recommending this option. 

What Does Post-Surgery Recovery Look Like with Light Adjustable Lenses? 

The early recovery period for LAL surgery is similar to that of standard cataract surgery. Most patients are back to their normal routines within a few days, taking care to avoid rubbing their eyes and following their prescribed eye drop schedule to support healing and reduce inflammation. 

The key difference comes in the weeks that follow: 

• Rather than having one post-surgical follow-up, LAL patients return to the office several times for their light adjustment appointments. 

• Each follow-up visit can last up to two hours while adjustments are being made, building toward the final outcome. 

• Your vision may be slightly blurry or change from day to day in the first weeks after surgery. This is completely normal — your eyes are healing, and the lens is still adjustable until the lock-in process is complete. 

Do You Need UV Protective Glasses After LAL Surgery? 

One of the most important aspects of LAL recovery is protecting the lens from unintended UV exposure before it’s locked in. Because the lens is designed to respond to UV light, exposure to ambient UV — from sunlight or other sources — could alter it before your surgeon has a chance to make the planned adjustments. 

After surgery, and while your vision is still in the adjustment phase, you will be required to wear RxSight UV-protective glasses that prevent UV light from altering your lens before the final lock-in. These glasses are provided by your doctor and should be worn consistently — indoors and outdoors — until the lock-in is complete. 

Is LAL Cataract Surgery Worth It? 

For patients who are good candidates, LAL cataract surgery offers something no traditional IOL can: the ability to personalize your vision based on how your eye actually heals. That’s a big benefit for anyone who wants to minimize their dependence on glasses or contact lenses after surgery, especially people with astigmatism who have historically been harder to correct with precision. 

The process does require more follow-up visits than standard cataract surgery, and it will involve additional out-of-pocket costs. Whether LAL surgery is worth it ultimately depends on your vision goals, your lifestyle, and your overall eye health. That’s a conversation best had with an experienced ophthalmologist who knows your eyes. 

Ask Jervey Eye Group If Light Adjustable Lenses Are Right for You 

At Jervey Eye Group, we’re proud to offer Light Adjustable Lens technology to our patients as part of our commitment to providing the most advanced cataract care available in the Upstate. Our experienced surgical team can walk you through all of your lens options, evaluate whether you’re a candidate for LAL surgery, and help you understand what to expect from start to finish. 

With four convenient locations in Greenville, Simpsonville, and Easley, getting the answers you need has never been easier. Call us at 864.458.3900 or learn more about cataract treatment options by scheduling your consultation today.