Frequently Asked Questions

For Patients

How does the Light Adjustable Lens work?
The unique feature of the Light Adjustable Lens is that the shape and focusing characteristics can be changed after implantation in the eye using an office-based UV light source called a Light Delivery Device or LDD. The Light Adjustable Lens itself has special particles (called macromers), which are distributed throughout the lens. When ultraviolet (UV) light from the LDD is directed to a specific area of the lens, the particles in the path of the light connect with other particles (forming polymers). The remaining unconnected particles then move to the exposed area. This movement causes a highly predictable change in the curvature of the lens. The new shape of the lens will match the prescription you selected during your eye exam.

What should I expect in the period after cataract surgery?
Please follow all instructions provided to you by your eye doctor and staff, including wearing of the UV-blocking glasses that will be provided to you. As with any cataract surgery, your vision may not be perfect after surgery. While your eye doctor selected the lens he or she anticipated would give you the best possible vision, it was only an estimate. Fortunately, you have selected the Light Adjustable Lens! In the next weeks, you and your eye doctor will work together to optimize your vision. Please make sure to pay close attention to your vision and be prepared to discuss preferences with your eye doctor.

Why do I have to wear UV-blocking glasses?
The UV-blocking glasses you are provided with protect the Light Adjustable Lens from UV light sources other than the LDD that your doctor will use to optimize your vision. Exposing the Light Adjustable Lens to other UV light sources will potentially change the lens correction in an uncontrolled manner. If you do not wear the provided UV-blocking eyewear, your vision may not improve or it could get worse. If this happens, please contact your physician.

How long do I have to wear the UV-blocking glasses?
The UV-blocking glasses must be worn at all times until your eye doctor tells you that you no longer need to wear them (usually 24 hours after your final light treatment). Total wear is typically about 4-5 weeks in duration, however, this may vary depending on the number of light treatments delivered.

I have a special event to attend in-between light treatments, do I really have to wear the UV-blocking glasses?
Yes, you must wear them all waking hours to prevent uncontrolled changes to the Light Adjustable Lens. It is important to think about the time period over which you must wear the UV-blocking glasses and any commitments that you may have. It may be best to schedule your surgery and treatments around these commitments.

Can I wear my regular sunglasses that have UV protection?
No. You must wear the UV-blocking glasses provided to you. These glasses have a special protective coating that no other glasses have.

Which pair of UV-blocking glasses should I wear if it is dark outside?
You must wear the dark pair of UV-blocking glasses during daylight hours, even if it is overcast. The clear pair can only be worn outside after sundown.

What happens if I lose or break my UV-blocking glasses?
Please notify your eye doctor/clinic as soon as possible if one of your two pairs of UV-blocking glasses are lost, damaged or unwearable, and then continue to wear the other pair. If both pairs are lost or damaged, wear the darkest sunglasses you have and contact your eye doctor/clinic.

What can or can I not do after surgery?

Showering - If there is a window or possible direct sunlight in your shower, please wear the UV-blocking glasses in the shower. If there is no direct sunlight, you do not need to wear your UV-blocking glasses when you shower. However, please put them on immediately afterwards.

Sports - Your eye doctor will advise you when you can return to sports. Your return to more impactful activities may need to be delayed until all light treatments are complete to guarantee a stable Light Adjustable Lens for light treatments.

Tanning Studio - A tanning studio bed is a very strong source of UV light, and should be avoided until all light treatments are complete and you have been advised that you can remove your UV-blocking glasses.

Make Up - Your eye doctor will advise you when you can return to wearing eye make-up. Be careful when removing eye make-up and do not place excessive pressure on the eye. Permanent make-up should be delayed until the eye is considered fully healed by your eye doctor.

Travel - Travel is not impacted. Be sure to remember all of your UV-blocking glasses and wear at all times. Be particularly diligent in protecting the eyes from UV sources in unfamiliar environment.

Work - Work is not impacted, unless your profession puts you at a higher risk of UV exposure. Please remember to wear your UV-blocking glasses at work until you are told by your eye doctor that it is no longer necessary.

Laser Hair Removal - It is recommended that you wait until all light treatments are complete and you have been advised that you can remove your UV-blocking glasses before proceeding with hair removal (IPL) treatments (different IPL devices use different wavelengths). This should include other facial beauty treatments that use light sources.

What should I do if I forgot to wear my UV-blocking glasses?
It is very important that you do not forget to wear your UV-blocking glasses. However, if you do forget, please put them on as soon as you remember.

How many total light treatments will I need?
A minimum of two light treatments — each lasting approximately 90 seconds — are required. The total number of light treatments is based on the achievement of the desired visual outcome that you and your doctor selected. Once you have achieved your final optimal vision, the lens power is permanently locked with a final light treatment to prevent any further changes.

How long do the light treatments last?
Each light treatment will last between 8 and 120 seconds, with the average being approximately 90 seconds. Variation in time is dependent on the type of treatment performed.

Are the light treatments painful?
Numbing drops will be applied to your eye, and there may be some mild-pressure or discomfort. However, the light treatments should not be painful.

What should I expect after each light treatment?
Your vision may be blurry immediately after each treatment due to a gel used during application of the light treatment, but this should resolve quickly. Additionally, your eye may be dilated for the treatment which may require wearing tinted glasses for a few hours. It may take approximately 24 hours after each light treatment to notice an improvement in your vision. The light from the LDD may also cause a temporary or long-lasting pink or red afterimage, which is common with a light source directed to the eye. This tinge to your vision is especially noticeable on things that normally look white.

 

For Healthcare Professionals

How does the Light Adjustable Lens work?
The unique feature of the Light Adjustable Lens is that the refractive power can be changed after implantation in the eye using a clinic-based UV light source called a Light Delivery Device or LDD. The Light Adjustable Lens contains photosensitive macromers distributed throughout the lens. When ultraviolet (UV) light from the LDD is directed to a specific area of the lens, the macromers in the path of the light polymerize with other macromers. The remaining unpolymerized macromers then move to the light exposed area. This movement causes a highly predictable change in the curvature of the lens. The new shape of the lens will represent the refraction entered into the LDD.

What should patients expect in the period after cataract surgery?
Patients must follow all instructions provided by their cataract surgeon, including wearing of the UV-blocking glasses provided to them at the conclusion of surgery. As with any cataract procedure, the patient's vision may not be perfect after surgery. Fortunately, these patients have selected the Light Adjustable Lens. Over the next few weeks, the patient and their eye doctor(s) will work together to optimize their vision.

Why must patients wear UV-blocking glasses?
The RxSight UV-blocking glasses that patients are provided with protect the Light Adjustable Lens from UV light sources other than the LDD that their cataract surgeon uses to optimize their vision. Exposing the Light Adjustable Lens to other UV light sources could potentially lead to uncontrolled refractive changes. If this happens, the patient should be advised to contact their physician.

How long must patients wear the UV-blocking glasses?
The UV-blocking glasses must be worn at all times until their cataract surgeon tells them that they no longer need to wear them (usually 24 hours after their final light treatment). Total wear is typically about 4-5 weeks in duration, however, this may vary depending on the number of light treatments delivered.

Are there any special considerations when caring for patients with UV-blocking glasses?
The patient should only remove their UV-blocking glasses when absolutely necessary (and continue wear immediately after each test is complete). Slit lamp examination can be performed as long as it is done efficiently and direct illumination of the IOL kept to a minimum. All exams should be performed in an efficient manner in order to minimize the amount of the time the patient is without UV-blocking glasses (to avoid incidental UV exposure to the eye).

Are there any special considerations when performing manifest refraction on Light Adjustable Lens patients?
If you are providing a refractive result to the patient's cataract surgeon for use in Light Delivery Device treatment, please remember that this is the correction the patient will receive to the Light Adjustable Lens and unlike spectacles and contact lenses, cannot be changed once locked in. Providing an accurate refraction, as well as offering any feedback on patient's preferences can be incredibly valuable to the cataract surgeon in providing the patient with their best possible vision.

Can patients wear regular sunglasses that have UV protection?
No. They must wear the UV-blocking glasses provided to them. These glasses have a special protective coating that no other glasses have.

What happens if the patient breaks or loses their UV-blocking glasses?
They must notify their cataract surgeon as soon as possible if one of the two pairs of UV-blocking glasses are lost, damaged or unwearable, and then continue to wear the other pair. If both pairs are lost or damaged, they should wear the darkest sunglasses they have and a peaked hat and contact their cataract surgeon immediately.

What can patients do or not do after cataract surgery (prior to lens lock in)?

Showering - If there is a window or possible direct sunlight in their shower, they should wear their UV-blocking glasses. If there is no direct sunlight, they do not need to wear the UV-blocking glasses. However, they should put them on afterwards.

Sports - The patient's cataract surgeon will advise them when they can return to sports. The patients return to more impactful activities may need to be delayed until all light treatments are complete to guarantee a stable Light Adjustable Lens for light treatments.

Tanning Studio - A tanning studio bed is a very strong source of UV light, and should be avoided until all light treatments are complete and the patient has been advised that they can remove their UV-blocking glasses.

Make Up - The patient's cataract surgeon will advise them when they can return to wearing eye make-up. Patients must be careful when removing eye make-up and should not place excessive pressure on the eye. Permanent make-up should be delayed until the eye is considered fully healed.

Travel - Travel is not impacted. Patients must remember to bring all of their UV-blocking glasses and wear at all times. They should be particularly diligent in protecting their eyes from UV sources in unfamiliar environments.

Work - Work is generally not impacted, unless their profession puts them at a higher risk of UV exposure. They must remember to wear their UV-blocking glasses at work until they are told by their cataract surgeon that it is no longer necessary.

Laser Treatments - It is recommended that they wait until all light treatments are complete and they have been advised by their cataract surgeon that they can remove their UV-blocking glasses before proceeding with laser treatments, such as hair removal (IPL) treatments (different IPL devices use different wavelengths). This includes other treatments that use laser for light sources.

What should a patient do if they forgot to wear their UV-blocking glasses?
It is very important that they do not forget to wear their UV-blocking glasses. However, if they do forget, they must put them on as soon as they remember. They should note how long they were without the glasses and the light conditions during that time and contact their cataract surgeon immediately.

How many total light treatments will patients need?
A minimum of two light treatments — each lasting approximately 90 seconds — are required. The total number of light treatments is based on the achievement of the desired visual outcome determined by the surgeon and patient. Once the patient has received final optimal vision, the lens power is permanently locked with a final light treatment to prevent any further changes..

How long does each light treatment last?
Each light treatment will last between 8 and 120 seconds, with the average being approximately 90 seconds. Variation in time is dependent on the type of treatment performed. The light treatment uses a coupling gel and contact lens to focus the UV light onto the Light Adjustable Lens (for the patient it will be very similar to a gonioscopy examination).

What should patients expect after each light treatment?
Their vision may be blurry immediately after each treatment due to the coupling gel used with the contact lens during application of the light treatment, but this should resolve quickly. Additionally, their eye may be dilated for the treatment which may require wearing tinted glasses for a few hours. It may take approximately 24 hours after each light treatment for the patient to notice an improvement in their vision. The light from the LDD may also cause a temporary or long-lasting pink or red tinge to their vision, that is especially noticeable on things that normally look white. For more information, please see the RxSight Patient Information Brochure which is available on our website at rxsight.com.

Contact Us

Customer Experience
(Orders): 833.888.7974
Corporate: 949.521.7830
Sales Inquiries: 949.421.5460

 
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