Adjusting Eye Implants with Lasers for Clearer Vision

This patent describes using precise laser pulses to change the focusing power of an implanted artificial eye lens, helping people see clearly without glasses.

What it covers

The patent details systems and methods for improving vision in a person who has an intraocular lens (IOL) implanted in their eye. It involves applying "a plurality of laser pulses" to the IOL. These laser pulses are designed to create a specific, permanent alteration within the lens material, a process called "refractive index writing." This writing results in a "predetermined change in phase profile" of the IOL, which means its focusing power is precisely adjusted. The ultimate goal is to increase "spectacle independence," allowing the person to see well without needing glasses or contact lenses. For example, after cataract surgery, if the implanted IOL doesn't provide perfect vision, this method could fine-tune the lens without requiring another surgery.

What it doesn't cover

• —Does not cover methods for adjusting an intraocular lens that do not use laser pulses.
• —Does not cover adjusting the optical properties of an intraocular lens before it is implanted into the eye.
• —Does not cover vision correction techniques that do not involve an intraocular lens, such as LASIK on the natural eye.
• —Does not cover intraocular lenses that are adjusted mechanically or chemically after implantation.
• —Does not cover methods that improve vision without making a permanent change to the refractive index of the IOL.

The clever bit

The novelty lies in precisely altering the optical properties of an already implanted lens using focused laser light. Instead of replacing a poorly focused lens, this method "writes" a new optical profile onto it, correcting vision without requiring another surgical procedure.

Why it matters

This technology could significantly enhance the outcomes for individuals receiving intraocular lenses, particularly after cataract surgery. It provides a non-invasive way to correct residual vision errors that might persist after the initial surgery. This ability to fine-tune vision post-implantation can lead to greater patient satisfaction and potentially eliminate the need for corrective eyewear, improving overall quality of life.

Real-world examples

• 1.RxSight Light Adjustable Lens (LAL) technology
• 2.Post-cataract surgery vision correction