The library temple is straight and pressure in used to held them on. This type of temple was developed for people who need to remove and replace their glasses many times during the day like near vision reading glasses.
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Advantages: The chart is familiar Inexpensive, quick and easy to use and interpret Disadvantages: Snellen chart has only one 6/60 lette...
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Preferences: Similarly quantities of letters per line. Consistently separating amongst lines and letters. Uniform movement ...
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