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Letters to the World


Eyeglasses and depth perception

Filed under: General — codeman38 @ 1:23 pm

Well, I got my new eyeglasses today, with the prescription from my eye exam a couple weeks ago…

…and wow, they must’ve done something with the prescription, because everything suddenly looks three-dimensional. As I may or may not have commented before, it used to be that everything looked relatively flat– some depth, but not a great amount– but now things actually stand out noticeably from the background!

Even weirder… I was just taking my glasses off and putting them back on for comparison, and it’s unreal. Take them off, everything’s flat; put them on, things stand out from the background. Repeat ad infinitum.

Go figure, eh? I wonder what they did to the prescription…


  1. What you are seeing is “curvature of field”. Its not the perscription its the glasses.
    To correct the problem, your lenses must be ground on both sides using high density (plastic) lenses.
    The lower cost glasses are ground (to perscription) on only one side.
    Thus all the “correction” is done (over done) using one side. Details .. ask?

    Comment by Anonymous — 20-Feb-2005 @ 9:02 am

  2. In my case (astigmatism) the correction resulted in a significant change in vertical dimension. Putting on the glasses for the first time was like adjusting the vertical height knob on a monitor. It took me a few days to get accustomed to the new “ground level” as the glasses made me feel like I was a few inches taller.

    Comment by Jetson — 29-Mar-2005 @ 4:26 am

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