Make HowStuffWorks your homepage
Braille, brayl, Louis (1809-1852), was a blind Frenchman who invented the braille system of printing and writing for the blind. He was born near Paris. An accident at age 3 followed by a serious infection left him blind. He entered the Royal Institution for Blind Youth in Paris (now the National Institution for Blind Youth) when he was 10. Braille was a good student, especially of science and music, and he became a church organist. He remained at the Institute as a teacher. There he developed… More »
Astigmatism, uh STIHG muh tihz uhm, is a visual defect in which both nearby and distant objects... More >>
Blind spot is a small area of blindness that is present in the field of vision of the normal eye.... More >>
Braille, brayl, Louis (1809-1852), was a blind Frenchman who invented the braille system of... More >>
Color blindness, sometimes called color vision deficiency, color defective vision, or daltonism,... More >>
Conjunctivitis, kuhn juhngk tuh VY tihs, is an inflammation of the membrane that covers the white... More >>
Contact lens is a device used to correct vision. Contact lenses are most commonly used to correct... More >>
Farsightedness, also called longsightedness, is a visual defect in which a person can see distant... More >>
Ophthalmia, of THAL mee uh, is a name for severe diseases affecting the eye membranes. These... More >>
Snow blindness is a temporary decrease in vision caused by bright sunlight reflected from snow.... More >>
-
EDITOR'S
CHOICE
Global Warming Image Gallery
-
FEATURED VIDEO
