No I wouldn't consider these as viable everyday wear, but given how badly nearsighted I am, they still give me much better focus than my natural vision.
I got 2 pairs of these delivered today for only $7.16 total ๐
this post was submitted on 24 Dec 2025
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Focuses light.
https://www.wikipedia.org/wiki/Pinhole_camera
A pinhole camera doesn't focus light. Only lenses can focus light. The reason why looking through a small hole makes the image sharper is exactly because that basically prevents the lens in your eye to "misdirect" light that's coming in from the side.
But there is a reason why our eyes are not pin hole cameras. The amount of light that hits your retina is pretty low when looking through a pin-hole so that actually only works on bright sunny days.
They work okay indoors too, with reasonable lighting anyways. Not any substitute for proper prescription glasses, but good as a cheap emergency backup.
For emergency it's probably way simpler to just make a small hole with your hand (like the diver "OK" sign but tighter) and look through that.
I appreciate the much more thorough and accurate answer. Thank you.