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Comment by JackRabbitSlim | Hacker News Reader

https://spectrum.ieee.org/biomedical/imaging/in-the-eye-of-t...

IEEE's coverage way back in 2003 and even by then a prototype existed as far back as 91.

I've been waiting for people to circle back around to this type of display for about a 2 decades now. I suspect the biggest barrier/reason is aversion to liability and safety of beaming lasers directly into customer eyes.

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Lasers have been used routinely to measure the eye for the last 20 years. And everyone making that technology probably toyed with the idea of making a display rather than a sensor because you deal with the same issues. My guess is it has been prophetic patents holding progress back, so hopefully they are starting to expire now.

I disagree, the biggest barrier to commercialization of this technology is that it's technically infeasible. For the projection to make it through your pupil onto the retina your eye needs to be carefully aligned with the projection beam. This just barely works indoors when you pupil is hugely dilated, now imagine being outside when your pupil is contracted. It's a non-starter.

Me too! Elsewhere in the thread I brought up the HIT Lab that patented the approach in the 90s. I've been waiting for it to come out of patent / become adopted for decades:

http://www.hitl.washington.edu/projects/wlva/

Right. Still waiting for long term studies about the effects of such retinal displays.

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