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Thread: Lens Flare in Gas Perm Lenses

  1. #1

    Default Lens Flare in Gas Perm Lenses

    I read something about a guy who wore rigid contacts for many years and didn't have any problems. That is until he got a new kind of contacts. (No brand was given, only that they were gas perm.) He then complained that night driving became difficult because he was experiencing what he called "lens flare." Maybe people who wear gas perm contacts don't need any explanation, but I don't and I do. What is lens flare?

  2. #2

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    I'm not sure if it's a scientific term or not, but it happens to me sometimes. It's when the pupil (often dilated) meets the edge of the lens and the image--most noticeable with lights in the dark--is distorted. Because gas perm lenses are generally very small and move around a lot, having a lens that perhaps isn't centered perfectly on a large or dilated pupil will distort the person's vision. This is probably most noticeable during night driving because (a) the pupils are dilated, and (b) the distortion of headlights is very pronounced.

    This happens to me at times and is a little annoying. It is due to the fact that my lens is thick and heavy so it rides a little low. I hope this makes sense; let me know if it doesn't.

  3. #3

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    Quote Originally Posted by nicholas View Post
    I'm not sure if it's a scientific term or not, but it happens to me sometimes. It's when the pupil (often dilated) meets the edge of the lens and the image--most noticeable with lights in the dark--is distorted. Because gas perm lenses are generally very small and move around a lot, having a lens that perhaps isn't centered perfectly on a large or dilated pupil will distort the person's vision. This is probably most noticeable during night driving because (a) the pupils are dilated, and (b) the distortion of headlights is very pronounced.

    This happens to me at times and is a little annoying. It is due to the fact that my lens is thick and heavy so it rides a little low. I hope this makes sense; let me know if it doesn't.
    I'm not sure I know what you mean by "distorted." Do you see halos around the lights?
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