Medical Devices

Laser-free vision correction uses electrical current to reshape eye

Laser-free vision correction uses electrical current to reshape eye
Scientists develop method to correct eyesight without surgery like LASIK
Scientists develop method to correct eyesight without surgery like LASIK
View 4 Images
Scientists develop method to correct eyesight without surgery like LASIK
1/4
Scientists develop method to correct eyesight without surgery like LASIK
Illustration of EMR
2/4
Illustration of EMR
The electromechanical reshaping technique successfully flattened this rabbit cornea, shown in a cross section, from its original shape (white line) to a corrected one (yellow line)
3/4
The electromechanical reshaping technique successfully flattened this rabbit cornea, shown in a cross section, from its original shape (white line) to a corrected one (yellow line)
The rabbit cornea before and after EMR treatment; the radius of curvature (C) shows a −3.12 diopter change in the refractive power of the cornea
4/4
The rabbit cornea before and after EMR treatment; the radius of curvature (C) shows a −3.12 diopter change in the refractive power of the cornea
View gallery - 4 images

Imagine correcting your vision in under a minute – no lasers, blades or pain. Scientists have developed a novel, non-invasive technique that reshapes the cornea using only a mild electric current and a temporary pH shift. In early trials, it reversed myopia without the need for traditional surgery – and could be the most radical advancement in eyesight correction technology since LASIK.

This emerging method that can remodel the cornea through mild electric potential, known as electromechanical reshaping (EMR), was detailed by researchers from Occidental College and the University of California, Irvine, during the American Chemical Society’s Fall 2025 meeting this week.

The cornea is the clear, dome-shaped surface at the front of the eye, acting as a transparent window that helps focus incoming light. It's made of tightly packed collagen fibers and is designed to be strong and smooth. When light enters the eye, the cornea is the first lens it hits – and it's here that most of light-bending (refraction) occurs in order to focus the light onto the retina at the rear of the eye. However, if the cornea has an irregular curve, it results in conditions such as nearsightedness (myopia) and farsightedness (hyperopia).

Illustration of EMR
Illustration of EMR

For those who want do do away with corrective lenses, the main option is LASIK (Laser-Assisted In Situ Keratomileusis) surgery, which uses a laser to reshape the cornea by removing microscopic amounts of tissue beneath a thin flap, allowing light to focus properly on the retina. While, for those suitable for treatment, LASIK has a high success rate – around 95% of patients go on to ditch their glasses only a few days after recovering from surgery – it's expensive and invasive, and cutting into the cornea alters the structural integrity of the eye.

“LASIK is just a fancy way of doing traditional surgery," said lead researcher and presenter Michael Hill, a professor in chemistry at Occidental College. "It’s still carving tissue – it’s just carving with a laser.”

The electromechanical reshaping technique successfully flattened this rabbit cornea, shown in a cross section, from its original shape (white line) to a corrected one (yellow line)
The electromechanical reshaping technique successfully flattened this rabbit cornea, shown in a cross section, from its original shape (white line) to a corrected one (yellow line)

What Hill and colleagues propose is instead working with the composition of the cornea to reshape the dome without removing any material from it. Made primarily of collagen, the cornea maintains its shape thanks to the arrangement of charged molecules and proteins. The researchers discovered that by applying a low-level electrical current through a specially designed platinum "contact lens" electrode, they could change the pH of the tissue, increasing the acidity of the corneal tissue, which would make it pliable just long enough to reshape – like fitting something into a mold. In this case, the mold is the platinum lens.

Then, once the current stops and the pH returns to normal, the cornea hardens again and holds its mold-fitted shape. The whole process takes about a minute, requires no cutting or removal of tissue, and, so far, has shown no structural damage or cell death in the tested samples. And the researchers believe EMR could replace LASIK surgery.

“The whole effect was discovered by accident,” said Brian Wong, a professor and surgeon at the University of California, Irvine. “I was looking at living tissues as moldable materials and discovered this whole process of chemical modification.”

The rabbit cornea before and after EMR treatment; the radius of curvature (C) shows a −3.12 diopter change in the refractive power of the cornea
The rabbit cornea before and after EMR treatment; the radius of curvature (C) shows a −3.12 diopter change in the refractive power of the cornea

In the study, researchers tested the EMR process on 12 separate rabbit eyeballs, reshaping 10 of them to mimic the corrective effect required for nearsightedness (myopia). After a short exposure to the current, each cornea conformed to the shape built into the electrode "lens", and preliminary measurements showed successful corneal correction – with zero incisions, lasers or trauma to the eye.

While EMR is still in its early stages of development and has had limited testing – on isolated eyes, not live models – Wong added that next comes "the long march through animal studies that are detailed and precise." The team will also determine what type of cornea corrections are possible with EMR.

"There’s a long road between what we’ve done and the clinic [and commercial use]," Hill added. "But, if we get there, this technique is widely applicable, vastly cheaper and potentially even reversible."

A 2023 paper in the journal ACS Biomaterials Science & Engineering detailed the development and use of EMR. The latest research was presented in a series of talks by researchers Michael Hill, Daniel Kim and Michelle Chen at the Fall 2025 meeting of the American Chemical Society this week.

Source: American Chemical Society via EurekAlert!

View gallery - 4 images
14 comments
14 comments
Alan
As usual in exiting research, we are left with the qualification that ""There’s a long road between what we’ve done and the clinic [and commercial use]," Hill added. "But, if we get there, this technique is widely applicable, vastly cheaper and potentially even reversible.""
Something like this would be a huge benefit to humans worldwide, so how about shortening that road to commercialization by putting more resources to work at multiple locations in different countries and even bringing in AI assistance to move the goal post closer?
I had Lasik 25 years ago. It is still holding up but I could use a tune-up. But my cornea lens may not have enough thickness to allow a 2nd go through.
However, this technique does not require cutting, so could be used where the thickness of the cornea is marginable. This technology would also allow any mistakes or misjudgments to be easily repaired.
Uncle Anonymous
As a guy who was first diagnosed with myopia sixty-one years ago when he was ten, I'm looking forward to when this process has been ironed out and radially available.
Glen Hillier
I agree with Alan in the comments below. I too could use a tune up from my previous LASIC surgery (also about 25 years ago). Would prefer not have to have the corneal incision if avoidable.
Jeff Rodman
After 68 years of "Coke-bottle bottom" -16 diopter glasses, cataract lens replacements have been a wonder: zero correction for reading, a mild -2 dopters for distance. Except I still need -2 diopters for astigmatism in all cases...perhaps this new technique can address cylinder (astigmatism) corrections too?
moreover
It would be good to know what happened to the ongoing trials where the cornea is reshaped by chemically relaxing the muscles. My optometrist told me two years ago that multiple big players were quite far in the process.
Dave222
A simple contact lense is so comfortable and easy to use these days. It also provides a certain wind and small particle protection. I wear 30 day lenses for 4 months straight without overnight removal. I've done this for the last 20 years. Each time I have a 6 monthly appointment with an optometerist, I dont tell them of my usage, asking them to comment on any problems. So far, so good. Zero issues. My reasoning is that the manufacturer would be silly to manufacture a lense that didn't have adequate permeability for oxygen to reach the cornea for both daily lenses and 30 day lenses. In my estimation, they are the same product, just marketed differently, as I've also worn daily lenses for 4 months, with the same results. I'm happy to do trials on myself to reduce the perhaps unnecessary use of rabbits for the solution to a problem that there is already a very good, non invasive solution for. I feel sorry for Master Wong that he's been programmed to see animal testing as " the long march". For who Wong? You at the lab, or the sentient rabbits that are eyeless or dead? IQ v EQ.....if clever scientists possessed or were taught a greater degree of emotional thought when deciding to pursue a particular innovation, perhaps all the planet's inhabitants would enjoy a better life. Did mid 10th century Chinese "innovators" of gunpowder and shortly after, the gunpowder lance, sit down for a moment and consider that their "cleverness" would still be felt by grieving families in Ukraine/Russia or Israel/Palestine today?
Faint Human Outline
Agreed, this research needs additional support. The sooner this can be perfected (computational simulations based on test subject biology, digital cloning for example), the more people this can help. If there is a way to sign up for updates on this research from the development team, it would be most appreciated!
BT
@FaintHumanOutline - it's frustrating difficult to keep track up research updates (and i know this research is still up in the air now due to federal government grant issues that continue). I'd probably suggest dropping Michael Hill from Occidental College an email and see if he and/or the team have some sort of RSS email feed, and the ACS has ways to follow its news on social media platforms, or via the newsroom. https://www.oxy.edu/academics/faculty/michael-hill
Techutante
Anecdotes galore! I developed an allergy to contact lenses.
Sara Nolan
This sounds promising, but I have some questions.
Would this technique be able to help those who have damaged, irregular corneas as a result of Lasik or PRK (like me)?
Have the researched checked what happens to the corneal nerves and tear film? Are they compromised?
Is there any risk of loos of structural integrity long-term? Ecstasia? Haze?
And I hope the rabbits are monitored long-term. At least, for the length of their natural lives. And I hope they're properly anaesthatised through all this, and well treated.
Load More