Scientists invent micrometers-thin battery charged by saline solution that could power smart contact lenses::Scientists from NTU Singapore have developed a flexible battery as thin as a human cornea, which stores electricity when it is immersed in saline solution, and which could one day power smart contact lenses.

2 points

All is fun and games until you get the blue screen of death.

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18 points

Great. Hopefully by the time smart contact lenses come out (if ever) I’ll be dead so I don’t have to worry about another tool that can be used to spy on you for not only the government but for the large tech companies looking for the most intrusive ways to steal your info on the daily.

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26 points

Oh hey look. A solution in search of a problem.

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9 points

Or a lot of new problems awaiting to happen.

A literal chemical battery in my eyes? No thanks.

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12 points

Would you be able to close your eyes to not see anything/ads? I don’t know much about the tech, but I would assume a light is being emitted from the contact lenses and since that’s behind your eye lids…

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6 points
*

I have no idea but I think anything that emit light would drain the battery to quickly.

I would imagine it would more like a e-paper screen.

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1 point

Light intensity is inversely proportional to the square of the distance. A light that’s only a few microns away from your cornea would look incredibly bright even with minimal power.

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6 points

I have no idea how these work, but one hack idea off the cuff:

You get the light for free. At least when your lids are open; that’s how vision works. A cheap digital watch lasts ages on a tiny coin cell because the polarisation of the LCD, which passes or blocks polarised light, takes minimal energy. Stack up a passive polariser, and the active LCD-like layer, (and maybe a second passive layer?) and you can cast selective shadows on the retina.

This gives you monochrome “smart vision” in the same sense as a monochrome Casio wristwatch. No idea how to tackle issues of focus at such a short focal length, or achieving any sort of active display let alone colour.

Maybe the whole thing is a pipe dream crackpot idea.

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21 points

Of course you can close your eyes and turn off ads for as low as $19.99/mo

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8 points

I’ll take rating 3 with low light enhancement, image link, and flare compensation.

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