{"id":960283,"date":"2026-05-14T23:10:13","date_gmt":"2026-05-14T23:10:13","guid":{"rendered":"https:\/\/www.europesays.com\/uk\/960283\/"},"modified":"2026-05-14T23:10:13","modified_gmt":"2026-05-14T23:10:13","slug":"brain-stimulating-contact-lenses-match-prozac-in-depression-study","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/uk\/960283\/","title":{"rendered":"Brain-Stimulating Contact Lenses Match Prozac in Depression Study"},"content":{"rendered":"<p><strong>Summary: <\/strong>Materials scientists have developed a \u201cwearable, drug-free\u201d contact lens capable of treating depression by delivering mild electrical signals through the retina.<\/p>\n<p>The study demonstrates that these specialized lenses are as effective as fluoxetine (the active ingredient in Prozac) at reducing behavioral, neural, and physiological signs of depression in mice. This technology leverages the eye\u2019s anatomical connection to the brain to stimulate mood-regulating circuits non-invasively.<\/p>\n<p><strong>Key Research Findings<\/strong><\/p>\n<ul class=\"wp-block-list\">\n<li><strong>The Retinal Pathway<\/strong>: Because the retina is anatomically an extension of the brain, researchers used it as a \u201cdoorway\u201d to stimulate specific mood-related brain regions.<\/li>\n<li><strong>Temporal Interference (TI)<\/strong>: The lenses use two electrical signals that only become active at their point of intersection. This allows for precise targeting of deep brain regions without affecting the surface of the eye.<\/li>\n<li><strong>Restored Connectivity<\/strong>: Electrophysiological recordings showed that the treatment restored the vital neural connection between the <strong>hippocampus<\/strong> and the <strong>prefrontal cortex<\/strong>, which typically degrades during depression.<\/li>\n<li><strong>Biological Shifts<\/strong>: After three weeks of 30-minute daily sessions, mice showed:\n<ul class=\"wp-block-list\">\n<li>A <strong>47% increase<\/strong> in serotonin levels.<\/li>\n<li>A <strong>48% reduction<\/strong> in blood corticosterone (a stress marker).<\/li>\n<li>Reduced levels of inflammatory molecules in the brain.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Prozac-Level Efficacy<\/strong>: Machine learning models consistently grouped mice treated with the lenses with \u201cnon-depressed\u201d control mice, indicating the treatment\u2019s potency was comparable to standard SSRI medication.<\/li>\n<\/ul>\n<p><strong>Source: <\/strong>Cell Press<\/p>\n<p><strong>Materials scientists have designed brain-stimulating contact lenses that are\u00a0as effective as Prozac at treating depression in mice.\u00a0The soft, transparent contact lenses have in-built electrodes that deliver mild electrical signals to the\u00a0brain via the retina\u00a0to stimulate specific brain regions associated with depression.\u00a0<\/strong><\/p>\n<p>Publishing\u00a0May 14 in the Cell Press journal\u00a0Cell Reports Physical Science,\u00a0the paper shows that\u00a0depressed mice\u00a0displayed\u00a0reduced\u00a0behavioral, neural, and physiological\u00a0signs of depression after three weeks of\u00a0treatment with\u00a0the contact\u00a0lenses.\u00a0\u00a0<\/p>\n<p>  <img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/www.europesays.com\/uk\/wp-content\/uploads\/2026\/05\/depression-contacts-neurotech-neuroscience.jpg\" alt=\"This shows a woman with a digital contact lense on her eye.\"  \/> The transparent contact lenses utilize ultrathin electrodes to deliver intersecting electrical signals that precisely target mood-regulating brain regions through the retina. Credit: Neuroscience News<\/p>\n<p>\u201cOur work opens up an entirely new frontier of treating brain disorders through the eye,\u201d\u00a0says senior author\u00a0and materials scientist\u00a0Jang-Ung Park of Yonsei University.\u00a0\u201cWe believe this wearable, drug-free approach holds tremendous promise for transforming how depression and other brain conditions\u00a0are treated,\u00a0including anxiety, drug addiction, and cognitive decline.\u201d\u00a0<\/p>\n<p>Current depression treatments\u2014including drugs, electroconvulsive therapy, and brain implants\u2014work by targeting brain regions and circuits that are associated with mood. Since the retina connects to some of these regions,\u00a0the researchers wanted to\u00a0try\u00a0using\u00a0the eye as a\u00a0pathway to\u00a0stimulate the\u00a0brain.\u00a0<\/p>\n<p>Previously designed smart contact lenses have been used to\u00a0monitor\u00a0eye and metabolic disorders, for example,\u00a0by measuring eye pressure or glucose levels, but this is the first time contact lenses have been used to treat\u00a0a brain\u00a0disorder.\u00a0<\/p>\n<p>\u201cBecause the eye is anatomically a part of the brain, we wondered whether a simple contact lens could serve as a gentle, non-invasive doorway to brain circuits that control mood,\u201d says Park.\u00a0<\/p>\n<p>The contact lenses stimulate the brain using a method called\u00a0temporal interference, which delivers\u00a0two electrical signals to the retina. These electrical signals only\u00a0become active at their point of intersection,\u00a0which\u00a0means that the treatment is very precise in only targeting specific brain regions.\u00a0\u00a0<\/p>\n<p>\u201cThink of two flashlights: each beam alone is dim, but where they\u00a0overlap,\u00a0a bright spot appears, and that bright spot can be created far away from the flashlights themselves. Our contact lens does the same with two harmless electrical signals,\u201d said Park.\u00a0<\/p>\n<p>\u201cEven though the electrodes sit on the surface of the eye, the signals only become active where they meet at the retina deep inside the eye, gently activating\u00a0the\u00a0natural wiring that carries the signal to mood-related brain regions.\u201d\u00a0<\/p>\n<p>The researchers designed the lenses to be flexible and transparent\u00a0by\u00a0building electrodes from\u00a0ultrathin\u00a0layers of\u00a0gallium oxide and platinum\u00a0and then\u00a0tested the contact-lens-delivered temporal interference in mice\u00a0with\u00a0induced depression.\u00a0<\/p>\n<p>They\u00a0compared four groups of mice: non-depressed control mice, depressed mice who did not receive any treatment, depressed mice who received\u00a0temporal interference, and depressed mice who received\u00a0fluoxetine, a selective serotonin reuptake inhibitor (SSRI) and the active ingredient in Prozac.\u00a0<\/p>\n<p>To assess the mice\u2019s depression\u00a0before and after\u00a0treatment, the team used behavioral assays, electrophysiological brain recordings, and\u00a0measured blood and brain\u00a0biomarkers\u00a0associated with\u00a0depression.\u00a0<\/p>\n<p>The contact lens treatment reduced signs of depression in all three categories.\u00a0Mice that received\u00a0temporal interference stimulation\u00a0for 30 minutes per day for three weeks\u00a0showed behavioral improvements that were comparable with mice who received\u00a0fluoxetine.\u00a0<\/p>\n<p>Recordings of brain activity revealed\u00a0that the treatment\u00a0restored\u00a0connectivity between the hippocampus and prefrontal cortex\u00a0that was lost due to depression.\u00a0The treatment also\u00a0partially restored\u00a0the\u00a0levels of biomarkers associated with depression, including\u00a0reduced levels of inflammatory molecules in the brain,\u00a0a 48% reduction in blood\u00a0corticosterone,\u00a0and\u00a0a 47% increase in serotonin levels\u00a0compared to the untreated depressed mice.\u00a0<\/p>\n<p>\u201cWe were struck that improvements appeared together across behavior, brain activity, and biology\u00a0and that the effect was comparable to a widely used antidepressant drug,\u201d says Park.\u00a0<\/p>\n<p>When the researchers asked a machine learning model\u00a0to group the mice based on their behavior, brain activity, and biomarker levels, the model\u00a0consistently grouped\u00a0mice in the contact lens\u00a0treatment group with\u00a0non-depressed control mice\u00a0rather than with\u00a0mice in the\u00a0untreated depression\u00a0group.\u00a0\u00a0<\/p>\n<p>\u201cLike any new medical\u00a0technology,\u00a0our contact lenses\u00a0will need to go through rigorous clinical evaluation in patients before reaching the market,\u201d says Park.\u00a0\u201cNext, we plan to make the lens fully wireless, test it for long-term safety in larger animals, and personalize the stimulation for each user before advancing into clinical trials in patients.\u201d\u00a0<\/p>\n<p><strong>Funding:<\/strong><\/p>\n<p>This research was supported by\u00a0funding from\u00a0the\u00a0National Research Foundation\u00a0of Korea, the\u00a0Institute for Basic Science, and\u00a0the Yonsei University Research Fund.\u00a0<\/p>\n<p>Key Questions Answered:<strong class=\"schema-faq-question\">Q: Does it feel like an electric shock in your eye?<\/strong><\/p>\n<p class=\"schema-faq-answer\"><strong>A<\/strong>: No. The authors describe it as a \u201cgentle\u201d stimulation. Because of the <strong>temporal interference<\/strong> method, the two beams remain \u201cdim\u201d and harmless on the surface; the \u201cbright spot\u201d of activity only forms where they meet at the retina deep inside.<\/p>\n<p><strong class=\"schema-faq-question\">Q: Is this just for depression, or could it treat other things?<\/strong><\/p>\n<p class=\"schema-faq-answer\"><strong>A<\/strong>: Senior author Jang-Ung Park believes this \u201cfrontier\u201d could eventually transform treatments for <strong>anxiety, drug addiction, and cognitive decline<\/strong> by targeting different brain circuits through the eye.<\/p>\n<p><strong class=\"schema-faq-question\">Q: When can I buy these at the pharmacy?<\/strong><\/p>\n<p class=\"schema-faq-answer\"><strong>A<\/strong>: Not yet. The technology must still undergo safety testing in larger animals and rigorous clinical trials in humans. The next step is making the lenses <strong>fully wireless<\/strong> and personalizing the stimulation for individual users.<\/p>\n<p>Editorial Notes:<\/p>\n<ul style=\"background-color:#ffffe8\" class=\"wp-block-list has-background\">\n<li>This article was edited by a Neuroscience News editor.<\/li>\n<li>Journal paper reviewed in full.<\/li>\n<li>Additional context added by our staff.<\/li>\n<\/ul>\n<p>About this neurotech and depression research news<\/p>\n<p class=\"has-background\" style=\"background-color:#ffffe8\"><strong>Author:\u00a0<\/strong><a href=\"https:\/\/www.utoronto.ca\/news\/authors-reporters\/don-campbell\" target=\"_blank\" rel=\"noreferrer noopener\"><a href=\"http:\/\/neurosciencenews.com\/cdn-cgi\/l\/email-protection#5d2d2f382e2e1d3e383131733e3230\" target=\"_blank\" rel=\"noreferrer noopener\">Julia Grimmett<\/a><br \/><strong>Source:\u00a0<\/strong><a href=\"https:\/\/cell.com\" target=\"_blank\" rel=\"noreferrer noopener\">Cell Press<\/a><br \/><strong>Contact:\u00a0<\/strong>Julia Grimmett \u2013 Cell Press<br \/><strong>Image:\u00a0<\/strong>The image is credited to Neuroscience News<\/p>\n<p class=\"has-background\" style=\"background-color:#ffffe8\"><strong>Original Research:\u00a0<\/strong>The findings will appear in\u00a0Cell Reports Physical Science<\/p>\n","protected":false},"excerpt":{"rendered":"Summary: Materials scientists have developed a \u201cwearable, drug-free\u201d contact lens capable of treating depression by delivering mild electrical&hellip;\n","protected":false},"author":2,"featured_media":960284,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4317],"tags":[268283,25948,1301,77753,268284,105,218,220,2996,268285,222,13971,268286,16,15,8464],"class_list":{"0":"post-960283","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-mental-health","8":"tag-brain-stimulating-contact-lenses","9":"tag-cell-press","10":"tag-depression","11":"tag-depression-treatment","12":"tag-fluoxetine","13":"tag-health","14":"tag-mental-health","15":"tag-neuroscience","16":"tag-neurotech","17":"tag-non-invasive-neurostimulation","18":"tag-psychology","19":"tag-psychopharmacology","20":"tag-temporal-interference","21":"tag-uk","22":"tag-united-kingdom","23":"tag-visual-neuroscience"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@uk\/116575459033446730","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/960283","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/comments?post=960283"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/posts\/960283\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media\/960284"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/media?parent=960283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/categories?post=960283"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/uk\/wp-json\/wp\/v2\/tags?post=960283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}