What are the Light Adjustable Lens that is used after Cataract surgery?
The Light Adjustable Lens (LAL) and Light Delivery Device (LDD) are medical devices that can be used after cataract surgery to improve vision without eyeglasses in some patients ¹.
The Light Adjustable Lens is the first and only intraocular lens (IOL), implanted during cataract surgery, and customized after cataract surgery. The Light Adjustable Lens is made of a special photosensitive material that can be adjusted in response to ultraviolet (UV) light. This optimization is done by your eye doctor in the weeks following lens implantation through a series of non-invasive light treatments that take only a few minutes each. You will have the unique ability to adjust and preview your vision until it meets your personal desires and lifestyle requirements. The Light Adjustable Lenses are designed to deliver
superior vision outcomes that non-adjustable or ‘fixed’ cataract lenses cannot match.
LDD stands for Light Delivery Device. It is a device that is used to adjust the Light Adjustable Lens after cataract surgery. The LDD emits a special ultraviolet (UV) light that changes the shape and power of the lens according to the patient’s vision needs. The LDD light treatments are performed by the doctor in the office after the surgery.
Who are the candidates for Light adjustable lens?
The Light Adjustable Lens and Light Delivery Device (LDD) system is approved for patients who have a cataract and need surgery for it, have corneal astigmatism (at least 0.75 diopters) before surgery, and do not have preexisting macular disease.
Eye flashes simulation Technique
How do they work?
The LAL is made of a unique material that reacts to UV light, which is delivered by the LDD, 17-21 days after surgery. Patients receive three or four light treatments over a period of 1-2 weeks, each lasting about 40-150 seconds, depending upon the amount of adjustment needed
¹. A clinical study of 600 patients was conducted to evaluate the safety and effectiveness of the RxSight Light Adjustable Lens and Light Delivery Device. Six months after the procedure, patients on average saw an improvement of about one additional line down the vision chart, for distance vision without glasses, compared to a conventional IOL ¹.
The device is intended for patients who have astigmatism (in the cornea) before surgery and who do not have macular diseases ¹. However, it should not be used in patients taking systemic medication that may increase sensitivity to UV light such as tetracycline, doxycycline, psoralens, amiodarone, phenothiazines, chloroquine, hydrochlorothiazide, hypercin, ketoprofen, piroxicam, lomefloxacin and methoxsalen. Treatment in patients taking such medications may lead to irreversible eye damage ¹.
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Source:
(1) FDA approves first implanted lens that can be adjusted after cataract …. https://www.fda.gov/news-events/press-announcements/fda-approves-first-implanted-lens-can-be-adjusted-after-cataract-surgery-improve-vision-without.
(2) Frequently Asked Questions | The Light Adjustable Lens from RxSight. https://rxsight.com/FAQ/.
(3) The Light Adjustable Lens – A Review – touchOPHTHALMOLOGY. https://www.touchophthalmology.com/anterior-segment/journal-articles/the-light-adjustable-lens-a-review/.
