RxSight’s Light Adjustable Lens (LAL) is a special kind of intraocular lens (IOL). In cataract surgery, the cloudy natural lens is removed and replaced with an IOL so you can see clearly again. Unlike normal IOLs, the LAL is adjustable after surgery. That means that after your eye heals a bit, your surgeon can fine-tune the lens to better match your vision goals. Basically, it’s the first and only lens that lets doctors “dial in” your vision later, rather than only before surgery.
How Does It Work?
- Implantation
During cataract surgery, the LAL is put in just like a normal IOL. - Healing & Waiting Period
Your eye needs time to heal-usually several weeks. During that time, things can shift slightly inside (like tissues settling), which can change how the lens power works. - Light Treatments (Adjustment Phase)
After healing, you’ll go to the doctor for a series of non-invasive light treatments. A device called the Light Delivery Device (LDD) shines controlled ultraviolet (UV) light onto the implanted lens to slightly reshape it. This changes the lens’s focusing power.
The surgeon can fine-tune in small steps (in 0.25 diopter increments) both the “sphere” (distance/overall focus) and “cylinder” (astigmatism) parts.
- Lock-In Phase
Once you and your doctor agree your vision is the best it can be, a final “lock-in” light treatment is done so the lens becomes stable and won’t change further. - Protecting from UV Light
Between surgery and the final lock-in, you must wear UV-protective glasses any time your eyes might be exposed to sunlight or stray UV light. If the lens sees unwanted UV light, its shape might change prematurely.
Benefits & “Why You’d Want It”
- Greater accuracy & customized vision
Many people don’t hit perfect vision with standard IOLs because of slight measurement errors or healing shifts. The LAL gives the ability to fix or refine vision after surgery. - Better odds of “20/20 without glasses”
In clinical trials, patients with the LAL were about twice as likely to achieve 20/20 vision (without needing glasses) compared to people getting standard monofocal lenses. - Fine control over astigmatism
The LAL can correct astigmatism down to about 0.50 diopters. It can also make adjustments in small increments to both sphere and cylinder. - Personal choice & preview
You get to “preview” your vision and say “this is good” or “let’s tweak it more.” You’re part of the process rather than just accepting a preset lens outcome.
Risks, Limitations & Things to Know
- Strict follow-up schedule
You must attend multiple light treatment visits and be consistent about wearing the UV glasses. If you skip or expose your eyes to UV too early, the lens can shift unwantedly. - Not for everyone
Some conditions disqualify its use. For example, if you’re taking medicines that make your eyes sensitive to UV light, or if you have macular disease (a retina condition), or you can’t reliably follow the regimen, the LAL might not be safe for you. - Cost / insurance issues
The LAL is a premium lens. Insurance often covers the cataract surgery itself, but not the extra cost of the adjustable lens and the follow-up treatments. - Possible side effects / complications
As with any eye surgery, there is risk of infection, inflammation, or other complications. Also, during the light treatments you might notice mild temporary changes, scratchiness, or color shifts. - Need for pupil dilation & fixation
The lens adjustments require the eye to dilate and stay still (fixated). Some eyes don’t dilate well, or people can’t reliably fixate.
Why Someone Should Choose It
You’re having cataract surgery to restore clear vision anyway. With the RxSight Light Adjustable Lens, you don’t have to “hope” for perfect focus after surgery-you can get it. Because this lens can be adjusted after your eye heals, you get a chance to fine-tune your vision so that what you see is exactly what you want. Less dependence on glasses. More control.
If you want the highest chance of seeing crisply at multiple distances without needing to settle, and you are willing to commit to follow-ups and wear special protective glasses for a few weeks, the LAL is a next-level option.
It’s the smart choice for people who want their vision outcome to match their life-because life doesn’t run on averages, and your eyes are unique.