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How exactly does one get bad eyesight? Some say it is by reading so much, which would suggest that people who wear glasses should get better grades. But is that true?Do people who wear glasses tend to ...
Glasses and contact lenses refract rays of light so that they are focused on a person’s retina. This science project demonstrates visually how glass can refract light rays. It is an educational ...
Glasses: frame including 2 safety glasses or lenses worn on the nose. See more
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