Thread

Lab on a Contact Lens Can Measure Stress Through Serotonin

70 points · 26 comments · marc__1

reilly3000 · 1790390191 · focus · HN ↗
Fascinating! How does the data make it off the lenses? Graphene-scale radios on my eyes sounds like it would have to have side effects.
1. NDlurker · 1790391146 · focus · HN ↗
  Color changing like a mood ring?
  1. sublinear · 1790396430 · focus · HN ↗
    This probably isn't that far off. That would keep the contact lenses inert and passive (no added side effects and no power needed).
    The color change could also be subtle enough to require a sensor in smartglasses, but I don't think that's too bad. If the lenses ever get to the point where they're relaying multiple things, you're going to need a sensor anyway to demux those signals.

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