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Diabetes Discussion
Newly Diagnosed
Newly diagnosed, blurry vision since rapid bg drop.
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<blockquote data-quote="Ambersilva" data-source="post: 886737" data-attributes="member: 43736"><p>We usually see better in bright light because the iris reacts to the brightness making the pupil smaller and gives a long focal length. In dim lighting the iris opens to let in more light and gives a short focal length.</p><p></p><p>Just like a camera lens, the smaller the aperture, the longer the focal length with more of the image in sharp focus. With the tiniest aperture most of the image will be in sharp focus to infinity. To obtain a photographic image with the subject in focus but with the foreground or background blurred we open the aperture wide for a short focal length.</p><p></p><p>As we get older the system works less efficiently and we need help to keep things in focus.</p></blockquote><p></p>
[QUOTE="Ambersilva, post: 886737, member: 43736"] We usually see better in bright light because the iris reacts to the brightness making the pupil smaller and gives a long focal length. In dim lighting the iris opens to let in more light and gives a short focal length. Just like a camera lens, the smaller the aperture, the longer the focal length with more of the image in sharp focus. With the tiniest aperture most of the image will be in sharp focus to infinity. To obtain a photographic image with the subject in focus but with the foreground or background blurred we open the aperture wide for a short focal length. As we get older the system works less efficiently and we need help to keep things in focus. [/QUOTE]
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Newly Diagnosed
Newly diagnosed, blurry vision since rapid bg drop.
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