[A CA Guy]

I agree, I went from perfect vision to 20/50 20/70 sixteen years ago. I got both contact lenses and glasses and my prescription hasn't changed at all.

I do wonder how I went from perfect vision as a kid to the 20/50 20/70 stuff when nothing has since changed?

I wonder why it changed to begin with?

[neverdem]

I wonder why it changed to begin with?

IIRC, the lens in your eye loses its ability to focus as folks age.

Reagan is King, are you available for a consult?

[lizma]

I wonder why it changed to begin with?

Two things happen as you grow up.

First the shape of your eyeball changes as you grow. Most little kids are a bit farsighted. If your eye lengthens too much you end up nearsighted, not enough farsighted.

Also the lens in your eye bends to help focus the light on to the back of your retina. It also absorbs the UV light that would harm your retina but with time UV light changes your lens making it less flexible and decreases it's focusing abilities necessitating longer arms or reading glasses.

It's been studied and proven decades ago that glasses, which only bend light so that images seen are directly on the retina, do not effect the final outcome of either of the changes an eyeball goes through. No exercises can change this outcome.

[Richard Kimball]

I had perfect vision until I was about 40. As we age, the elasticity of the connections that allow us to focus (think of a camera lens) the eye decreases, and no longer has the range it once had.

There are, of course, other reasons for decreases in vision capability, but if the decline started after age thirty, this is the most common reason. Usually, it affects our close focus vision, which is the reason people go to "reading glasses" after a certain age. Since my far vision is still fine, I wear one contact, and use my right eye to read, and my left eye (dominant eye, one used for shooting a firearm or looking through a camera viewfinder) for far vision.

[thombo]

Can i add my 2 cents worth?"I wonder why it( my vision) changed to begin with"? I wondered about that as well. My vision was 20/20 up till my mid 30's. My eye Dr. explained that as we age,constant pressure on the eye changes/inhibits the ability of the eye to focus.Objects far away or close up appear fuzzy,blurred ie out of focus.This is prob an over simplification(i'm not an MD),but that was the jist of our conversation.