Laser-free vision correction uses electrical current to reshape eye

Scientists develop method to correct eyesight without surgery like LASIK. Depositphotos –

2025 Aug 19
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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.* *Hill, et al./ACS Biomaterials Science & Engineering/(CC By 4.0)*

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). Daniel Kim and Mimi Chen

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.* *Hill, et al./ACS Biomaterials Science & Engineering/(CC By 4.0)*

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 …[for the balance of this extremely interesting and important article please visit: https://newatlas.com/medical-devices/emr-vision-cornea-lasik/]
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Source: American Chemical Society via EurekAlert! View gallery – 4 images
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Medical Devices Occidental College University of California New Eye Sight System Sight Eye surgery
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Bronwyn Thompson

Bronwyn has always loved words and animals, and she has the journalism and zoology degrees to prove it. After more than 20 years as a writer and editor, the former music journalist went back to university to build on her passion for wildlife and conservation with a Bachelor of Zoology, which unlocked two new loves: sharing animal facts at any opportunity and getting others excited about science. Particularly interested in neuroscience, genetics, animal behavior and evolutionary biology, Bronwyn has found a happy home at New Atlas, coming on board in February 2023.
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1 Comment

Alan – 2025 Aug 19 – 03:49 PM

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.
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