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Simply put, it means you'll want your reading material about 1.33 meters away from your eyes. The letters will look about as large as they always do at a distance of 1.33 meters, but with the glasses on you'll be able to focus on your reading material comfortably.
If you'd rather have your book or screen 1 meter away, use +1 diopter lenses; half a meter away, use +2 diopter lenses; 0.33 meters away, use +3 diopter lenses and so on. The closer you put the reading material, the larger it appears (just like always). Of course your mileage may vary, so use these numbers as a starting point to see what works for you.
The general idea is that those of us with so-called "normal" vision (or vision that's been corrected to normal with glasses or contact lenses) are focused on objects a long way away when our eyes are relaxed. By using reading glasses and putting our reading material one focal length in front of the glasses, we make the reading material appear to be a long way away, without changing it's apparent size. The focal length of the lenses in meters is 1 divided by the power in diopters. One might say the purpose of reading glasses isn't to magnify, it's to be able to focus comfortably.
Sometimes optics like magnifying glasses and telescope eyepieces are spec'ed in terms of magnifying power. Magnifying power can be calculated as the power of the lens in diopters, divided by 4. The idea here is that someone decided 250 mm is a reasonable value for the closest "normal" people can focus, so they use 4 diopters for the baseline to compare against when considering the apparent size of objects viewed through a magnifying lens.
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How do you put glasses in a sentence?
In the UK glasses also mean spectacles so,...... My husband could not find his reading glasses oR The waiter filled up the wine glasses.
Is the word glasses a noun?
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What does it mean when reading and the words appear double vision?
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Does Victoria Justice were glasses?
ya Victoria does wear glasses she only wears it for reading ..i met her at citywok and she had glasses on so ya she does wear glasses yup! She wears "reading" glasses. Don't get them mixed up! I met her at her 'make it in america' tour and she had glasses on after her concert and i asked her why. She said: "Oh haha! They're only reading glasses lassie."
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Obiosly GLASSES
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Do you need glasses if you can't see things far away and things look blurry?
You probably do have your eyes looked at by a optometrist or beter still an eye specialist as there may be other reasons for your reading problem.
what does a reading of 6 mean?
what does a reading of 6 mean?
Is prescription eye glasses or transgression eye glasses better?
Don't you mean TRANSITION?
