Dr. Ralph Chu of Chu Vision Institute, a renowned surgeon, has always been at the forefront of advancements in refractive and cataract surgery and is keen to bring the latest lens implant technology to his patients. One of the innovative procedures he performs is cataract surgery with the Light Adjustable Lens (LAL).

We're Committed to Your Safety
In any medical procedure, concerns are inevitable. We understand the importance of addressing these worries to ensure our patients are comfortable and informed. Patients may experience increased sensitivity to sunlight after their LAL surgery until their final adjustment process is complete.
This photosensitivity is due to the unique silicone material of the LAL, which reacts to ultraviolet light. Therefore, patients are advised to wear UV protective glasses and sunglasses outdoors until the adjustment process is locked in on their final adjustment visit. For more information on sunglasses after cataract surgery, please refer to this: How long do I need to wear sunglasses outside after cataract surgery?
We also have patients ask us if the LAL will affect their pupil size, increase their eye pressure, or change their contrast sensitivity. However, Dr. Chu and our team at Chu Vision ensure that these are addressed during the eye examination and post-operative check-ups, to put our patients minds at ease.

Meet Dr. Ralph Chu
Board-certified ophthalmologist Dr. Ralph Chu is a fellowship-trained corneal specialist and a nationally recognized leader in refractive and cataract procedures. His specialty areas include cataract, LASIK, cornea, and minimally invasive glaucoma surgeries for patients in the Minneapolis, St. Paul, and Twin Cities areas.

Light Adjustable Lens All Your Questions Answered
What is a Light Adjustable Lens?
A Light Adjustable Lens (LAL) is an intraocular lens implant that can be adjusted post-surgery using a specific wavelength and intensity of ultraviolet light. It is developed and manufactured by RxSight.
What is the material of the Light Adjustable Lens?
The LAL is made of silicone and has a diameter of 6mm with an optical zone of 5.5mm.
What surgeries use a Light Adjustable Lens?
LAL artificial lens implants are used in cataract surgery, and can also be used in custom lens replacements for over-40 vision (presbyopia), near-sighted vision (myopia), and far-sighted vision (hyperopia) correction.
How is the Light Adjustable Lens inserted during surgery?
After the eye is completely numbed for comfort, the LAL is inserted by an ophthalmologist using an injector system. Dr. Chu first creates a small incision in the cornea. The LAL is then loaded into the injector system, which folds the lens. This folding allows the lens to be inserted through the small incision. Once inside the eye, the lens unfolds, and Dr. Chu positions it in the correct location. The injector system is carefully designed to protect the lens during this process, ensuring that it’s not damaged or contaminated. It plays a crucial role in making the procedure minimally invasive, which typically results in quicker recovery times for patients.
What is the adjustment process for a Light Adjustable Lens?
The adjustment process for a Light Adjustable Lens (LAL) begins about four weeks after the initial implantation of the lens. During these sessions, Dr. Chu at Chu Vision uses a device specifically designed to emit controlled UV light onto the implanted lens. This UV light exposure causes the silicone molecules within the lens to rearrange, altering its shape and thus changing the refractive power of the lens. These adjustment sessions are tailored to your specific needs. The procedure is painless, and patients only need to sit in front of the light delivery device for about a minute while the adjustment takes place. Following each adjustment, the patient will typically notice an improvement in visual acuity. The full results become apparent after the final adjustment session, which is followed by a ‘lock-in’ procedure. During this lock-in procedure, the entire lens is exposed to a different wavelength of UV light to solidify the changes and prevent further modifications. This step ensures the long-term stability of the lens’ refractive power.
What is the prescription range of adjustment for a Light Adjustable Lens?
The LAL allows for a broad diopter range adjustment from -10 to +15, as well as cylinder adjustment from -2 to +2.
Is the Light Adjustable Lens approved by the FDA?
Yes, the LAL received a full clinical trial, and the Food and Drug Administration approved the lenses in 2020.
How successful is the Light Adjustable Lens procedure?
The success rate of LAL implantation is reported at 92%.
Is the procedure for a Light Adjustable Lens reversible?
No, the procedure of LAL implantation is not reversible.
How much does a Light Adjustable Lens cost in Minneapolis?
The cost of LAL is typically around $6000 for the lens. Surgical costs may be additional. Insurance coverage varies depending on the policy.
How long does Light Adjustable Lens last?
Light Adjustable Lenses are meant to be a permanent solution.
What countries have approved the use of the Light Adjustable Lens?
The LAL has been approved for use in the USA, EU, Canada, and Australia.
What conditions may not be suitable for a Light Adjustable Lens?
Contraindications include people who already have UV sensitivity. Other medical conditions of the eye may be contraindicated, but this will be discussed upon thorough examination of your eyes.
What is the follow-up schedule after having a Light Adjustable Lens implanted?
Follow-up visits are typically scheduled for one day, one week, and one month after surgery. The adjustments are scheduled every week for about three to five weeks. Then, after the adjustments, you’ll have another visit a month later. The follow-up tests include visual acuity, refraction, and intraocular pressure checks.
Does the Light Adjustable Lens have UV protection?
Yes, the Light Adjustable Lens has UV protection.
How long does an average adjustment session last?
An average adjustment appointment lasts approximately 90 minutes. However, the adjustment itself only takes about a minute per eye.
What are the potential future applications of the Light Adjustable Lens?
Potential future applications include the treatment of astigmatism and high hyperopia.
Is professional training required to implant the Light Adjustable Lens?
Yes, in addition to all the board credentialing Dr. Chu has in ophthalmology and refractive surgery, additional professional training is required and provided by RxSight®, the manufacturer and patent holder of LAL.
Can the Light Adjustable Lens be used in pediatric and elderly populations?
The LAL is not recommended for use in the pediatric population, but it can be used in the elderly population.
Who makes the Light Adjustable Lens?
RxSight® is an ophthalmic medical technology corporation headquartered in Aliso Viejo, California, that has commercialized the world’s first and only adjustable intraocular lens (IOL) that is customized after refractive lens exchange or cataract surgery.














