Tear dopamine sensor for Parkinson's
Analysis based on 12 articles · First reported Jul 08, 2026 · Last updated Jul 20, 2026
The sensor is still in early research stage and not commercialized, so immediate market impact is minimal. However, if validated with human tears, it could disrupt the neurological diagnostics market by offering a low-cost, non-invasive alternative to current methods.
Researchers from the Federal University of Pelotas, led by Neftalí Lenin Villarreal Carreño and Lucas Minghini Gonçalves, developed a low-cost electrochemical sensor using laser-induced graphene to detect dopamine in artificial human tears. The sensor, about the size of a postage stamp, accurately measured dopamine concentrations relevant to Parkinson's disease and other neurological conditions. The study was published in ACS Omega by the American Chemical Society. Funding was provided by Brazilian agencies including Brazil — Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brazil — Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul, Brazil — National Council for Scientific and Technological Development, and Brazil — Brazilian Company for Industrial Research and Innovation. The technology aims to enable non-invasive, ultra-early detection of neurological disorders.
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