But it does
Eyeglasses are designed with a focal length to project an image through the lens in your eye onto your retina, not to concentrate all the light into a single point.
That said, please don’t stare at the sun for 5 continuous seconds. You are likely to cause permanent long-term damage to your retina doing that. Don’t look directly at the sun at all, ever
Something that i havent seen here i that there are dofferent types of glasses. Iirc they use concave lenses for farsightedness and convex for short sightedness. You cant focus light with a convex lens. I could have this backwards or totally wrong, someone please let me know.
Both eye glasses and magnifying glasses can be used to start a fire but both also take a bit to do so and have to be held in the exact right angle.
Right angle and focal distance. Eyeglasses sit such that the focal point concentrated enough to start a fire is a focal point further away than the back of your retina. But it can still cause permanent sunburn/vision loss.
It could if you actually maneuver your glasses to focus the light into a single spot like you would with a magnifying glass. I feel like you’ve never actually done it with a magnifying glass if you’re assuming it’s as simple as just getting it between the sun and the thing you’re trying to burn. It takes some fanagling to line everything up perfectly.
But also even without glasses (magnifying or otherwise), looking directly into the sun will fuck your eyes up.
I’m not sure this is correct. Is it not the case that when your glasses are the proper prescription for your eye, the light from any point source is focused onto one place on your retina? Otherwise your vision would be blurred with the image being spread over an area (the normal situation for people with myopia or hyperopia while not wearing their glasses)
But yes, don’t look directly into the sun, with or without glasses.
Even a magnifying glass isn’t going to burn things by just holding it in the light. You have to angle it and move it further/closer to actually focus it all into a tiny little pin-sized area. Average prescription lenses not being as powerful lens wise as a magnifying glass would require even more playing around with to focus the light into a small enough point to actually start a fire.
Right, but we’re talking about the eye, which glasses are made to focus light into a pin-point with in combination with the natural refractive properties of the eye itself when placed at a specified distance from the eye. Naturally if the glasses were specifically created with a more appropriate focal length, it would be much easier to start a fire with them.
They focus into your retina, which is small, but not pinhead small. The length they sit away fron your eyes is part of it. You could take them off and get that focal point to be concentrated in much smaller area.
The retina is not as small as a pinhead, but the light from any source doesn’t get focused over the whole thing, it gets focused to a point. Anything else would mean the image is blurred, defeating the point of the glasses.
It does, but your eyes have a lot of water in them. Don’t do it again.
If you don’t look away from the Sun after 0.05 seconds of direct eye contact what kind of robotic AI are you?
