Guide to Eyeglasses

The invention and proper use of bifocal eyeglasses

The first pair of eyeglasses was invented in the 13th century for people to magnify objects they want to see. Using convex lenses, it was used to compromise farsightedness, which is the inability to see items nearby clearly. Later in the 24th century, nearsightedness was also correctable by using concave lenses.

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