I was just wondering, when I look through a pin hole (sometimes larger than a usual pinhole which i can make by twisting my fingers) I can see really clearly and sharp and its breathtaking even the the field of vision is greatly reduced, and this is without a lens! I have a mist in this eye after hydrops, but my 'good' eye doesn't respond at all like this to a pinhole!
Does this mean my vision is correctable in that eye?
Pinholes
Moderators: Anne Klepacz, John Smith, Sweet
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John Smith
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Not necessarily, but there's a good chance.
Light going through the exact centre of a lens (such as your cornea) isn't bent at all, so your pinhole vision represents your best possible vision if everything else was perfect.
If your cornea is otherwise undamaged (no scarring etc) then I'd say that there's a good chance that vision is correctable by either contact lenses or even specs (though this is much less likely)
Light going through the exact centre of a lens (such as your cornea) isn't bent at all, so your pinhole vision represents your best possible vision if everything else was perfect.
If your cornea is otherwise undamaged (no scarring etc) then I'd say that there's a good chance that vision is correctable by either contact lenses or even specs (though this is much less likely)
John
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Sweet
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Pinholes work by focusing a beam of light directly through the centre of your cornea enabling you to get the best vision without pheripheral vision getting in the way. It corrects to the best that your cornea and lens will but whether you would get that with glasses or a lens is a different matter! KC is a lot more complicated and takes a lot of refits to get it right.
Sweet X x X
Sweet X x X
Sweet X x X
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Andrew MacLean
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They know when they ahve attained the best correction when your pinhole vision and your full eye vision converge.
Quite a lot of people whom I know with KC wear pinholes in the evening when they gake off their lenses. They can sit and watch TV through the pinhole.
But be warned. Do not ever try to move about while wearing pinhold specs.
Andrew
Quite a lot of people whom I know with KC wear pinholes in the evening when they gake off their lenses. They can sit and watch TV through the pinhole.
But be warned. Do not ever try to move about while wearing pinhold specs.
Andrew
Andrew MacLean
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Rob Armstrong
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Hi Tim, http://www.eyetrainers.co.uk has been mentioned on here a few times as a potential place to get yourself a pair of pinhole glasses. I've used them myself.
Rob.
Rob.
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