Tommaso da Modena’s artwork from 1352 is the first instance in which the usage of spectacles was depicted artistically. Monks are shown reading and writing manuscripts in his picture. Another monk has his spectacles perched on his nose, while the first employs a magnifying lens.
History of Glasses
A reading stone, the original visual aid, was created about the year 1000 AD. A glass sphere called a “reading stone” was placed on top of the reading material to enlarge the letters. Around 1284, in Italy, the first eyeglasses that could be worn were created. Salvino D’Armate is credited as their creator.
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Designer of eyeglasses
Most frequently, Salvino D’Armate is given credit for creating the first pair of worn eyeglasses in or around 1284. The first pair of glasses, which sat on the bridge of the nose, were given for hyperopia. Sam Foster created sunglasses as we know them now in 1929. He created it with the aid of a polarizing filter and offered it for sale to customers in an Atlantic City Woolworths.
People were aware of the concave and convex lens principles in the seventeenth century. Eyeglasses can be made with single lenses that only correct near or far vision or with multifocal lenses that also correct reading and distance vision. Nearsightedness is treated by using concave glass, which causes the light beams to diverge. To help correct farsightedness, convex lenses are utilized, causing the light rays to converge. Sir George Airy developed cylindrical lenses for astigmatism correction in 1825. With a lower component for viewing items close up (as in reading), bifocal lenses can be used to cure nearsightedness and presbyopia. Benjamin Franklin came up with them for the first time in 1784.
Spanish artisans created the first temples for eyeglass frames in the 1600s. They attached strings or silk ribbons to the frame, looped them over the wearer’s ears, and fastened them. the novel styles of eyeglasses that Spanish and Italian missionaries brought to China. The Chinese put tiny copper weights on the strings rather than creating loops. Optician Edward Scarlett created the rigid temples that sit on top of the wearer’s ears in 1730.
Lens materials for glasses might be made of polycarbonate, glass, or plastic. The initial material for eyeglasses was glass because of its excellent visual clarity, but stronger prescriptions can make the glass lenses exceedingly heavy. Although plastic lenses are substantially lighter than glass, they are more prone to scratching. The polycarbonate, often known as CR-39, lens material for glasses is the lightest and thinnest.
As per discover vision centers, In America, 20.5 million people aged 60 and over have cataracts, while an estimated 64 percent of adults wear glasses.