Eye - care physicians around the world have been prescribing the glasses for over 200 years according to Helmholtz theory.
Honest Eye-care physician William Bates (1860–1931) prescribed glasses to his patients but he could not understand - none of the glasses improved their eyesight.
Moreover, he observed patients coming back for stronger glasses...
Some of the people would call Mr. Bates and report their glasses lost or broken. In 19th century glasses were expensive, so patients would spend a month or two without them.
Upon their arrival to his office, Mr. Bates would check their eyesight and discover that it improved drastically. After 30 years of experimenting he concluded that without glasses eyesight gets better due to the eye muscles getting exercises.
Glasses and contacts are practically guaranteed to ruin your vision over time...
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