re: People with really bad vision: Do you ever think how lucky you are?

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This is gonna sound weird, but I don't really get how someone has bad vision.

Like I think it's a thing you have to experience. I have good eyesight so I just don't understand how someone can't read that sign, or can't distinguish those small objects from each other or whatever it is.

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Yeah. Stuff just gets blurry. So let's say you are looking at a sign. Just keep walking backwards until it's hard to read because it's blurry. For someone with bad vision, that's going to happen sooner. And when it gets really bad (like myself), everything is blurry very quickly (like 6 inches from my face). All of the colors start fuzzing together. If I squint, it really does help. Something about letting less light into my eyes.

quote:

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This is gonna sound weird, but I don't really get how someone has bad vision.

Like I think it's a thing you have to experience. I have good eyesight so I just don't understand how someone can't read that sign, or can't distinguish those small objects from each other or whatever it is.

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Think about how a camera has to focus when you attempt to take a picture. You focus the light depending on the distance of the object being photographed. If the light taken in by the camera lens isn't properly focused, parts of the image appear blurry.

It's pretty much the exact same for eyeballs. The eyeball has some sort of defect which prevents light from being focused properly inside the eyeball. So everything looks out of focus and blurry.