34
Pinhole glasses. Fuck AI (lemmy.world)
submitted 10 months ago by to c/glasses@lemmy.sdf.org
22 comments fedilink hide all child comments
 

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 ๐Ÿ‘

you are viewing a single comment's thread
view the rest of the comments
[โ€“] 9 points 10 months ago (12 children)

What do the pin holes do?

  • permalink
  • fedilink
  • source
  • hideshow 12 child comments
    •
  • [โ€“] [S] 13 points 10 months ago

    They help improve blurry vision to an extent, without needing a prescription. They're definitely not any substitute for prescription glasses for everyday wear, but for $7.16 for 2 pairs of them, they're a fine emergency backup.

    Though they are a little odd to look through, but not too bad really. Still, with all that said, I definitely would not recommend driving a vehicle with them on.

  • permalink
  • fedilink
  • source
  • parent
  • [โ€“] 6 points 10 months ago (4 children)
  • permalink
  • fedilink
  • source
  • parent
  • hideshow 4 child comments
    •
  • [โ€“] 13 points 10 months ago (3 children)

    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.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 3 child comments
    •
  • [โ€“] [S] 5 points 10 months ago (1 child)

    They work okay indoors too, with reasonable lighting anyways. Not any substitute for proper prescription glasses, but good as a cheap emergency backup.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 1 child comment
    •
  • [โ€“] [S] 1 point 7 months ago

    They help improve blurry vision to an extent, without needing a prescription. They're definitely not any substitute for prescription glasses for everyday wear, but for $7.16 for 2 pairs of them, they're a fine emergency backup.

    Though they are a little odd to look through, but not too bad really. Still, with all that said, I definitely would not recommend driving a vehicle with them on.

  • permalink
  • fedilink
  • source
  • parent
  • [โ€“] 1 point 7 months ago (4 children)
  • permalink
  • fedilink
  • source
  • parent
  • hideshow 4 child comments
    •
  • [โ€“] 1 point 7 months ago (3 children)

    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.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 3 child comments
    •
  • [โ€“] [S] 1 point 7 months ago (1 child)

    They work okay indoors too, with reasonable lighting anyways. Not any substitute for proper prescription glasses, but good as a cheap emergency backup.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 1 child comment
    •