Depressed mice successfully treated with smart contact lenses that zap their brains – recent study

Scientists in South Korea have developed experimental contact lenses designed to send electrical signals through the retina and into areas of the brain related to mood. In mice, the technology appeared to enhance depression-like behavior.

The idea sounds futuristic: a contact lens that would someday help treat depression by stimulating the brain through the attention. gave work Still at a really early stage, results are up to now limited to only one mouse study.

The eye is already certainly one of the body’s most useful access points for medical technology. Light passes through the cornea and lens before reaching the retina, which converts it into electrical signals carried by the optic nerve to the brain. Because of this close connection, researchers have spent years developing technologies that use the attention to observe disease.

Smart contact lenses Already designed to observe certain eye conditions, e.g Glaucoma. Others can do smart contact lenses. Track pupil size As an indicator of nervous system activity, because the iris reacts to light, emotions and a few drugs. And scientists have also developed experimental lenses. Monitoring of glucose levels in individuals with diabetes.

The latest research tries to do something different: using the attention as a pathway to the brain.

Contact lenses contain small electrodes that send light electrical signals through the retina, a layer of light-sensitive tissue behind the attention. The researchers used a way called temporal interference, during which two barely different electrical frequencies are delivered at the identical time. The signals are designed to be fully activated only where they overlap, allowing researchers to focus on specific brain regions linked to mood regulation.

The researchers compared the method. Two weak flashlight beams crossing to form a vivid point where they meet. In theory, the approach could activate brain circuits which can be linked to depression.

These experiments were performed on rats that were injected with stress hormones to induce depression-like behavior. The researchers acknowledge that this doesn’t fully reflect human depression. Scientists also proceed to debate the link between stress hormones and depression, with studies yielding mixed results Questions about cause and effect remain..

For the study, the researchers fitted tiny contact lenses to mice that had damaged photoreceptors, meaning their vision was already impaired. This was obligatory because normal visual activity would interfere with the electrical signals passing through the attention. The technique, as tested, will due to this fact not work in animals or individuals with healthy retinas.

There continues to be a method to go.

There are other reasons to be cautious. Human eyes adjust focus by always changing the form of the lens, which mouse eyes don’t do in the identical way. This movement can interfere with the signals provided by the contact lens placed on the cornea.

The technology also faces practical challenges. Smart lenses require careful fitting to avoid damaging the cornea and should be kept clean to cut back the danger of infection. Any medical data they collect may also require strong security measures.

The lenses are very expensive to make and the researchers say the technology shouldn’t be yet commercially viable on a big scale. A recent review Highlighted the difficulties faced in making smart contact lenses.

Depression itself is difficult to model in laboratory animals. Symptoms, causes, and severity vary widely between patients, making it difficult to directly compare experiments with stressed rats raised under fastidiously controlled laboratory conditions.

Non-invasive brain stimulation is already a longtime area of ​​clinical research, and this work may inform future studies. But the outcomes of a small mouse experiment involving visually impaired animals are still removed from a treatment that may very well be utilized in humans.

Nonetheless, the thought of ​​treating depression with smart contact lenses is intriguing, and this preliminary work adds a creative recent thread to the broader search for brand spanking new treatments for depression.