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  2. The first wearable eyeglasses were thought to have been invented around 1284, by Salvino D'Armate, and were used to help far-sighted individuals read. They were placed on the bridge of the nose.
    www.advantagedental.com/blog/the-history-of-eye…
    The reason: for the first time in human history, millions of people were able to enjoy good vision in spite of problems with their vision. Today we take this for granted, but for centuries there was simply no solution for those suffering from a visual impairment – glasses still had to be invented.
    www.zeiss.com/vision-care/us/eye-health-and-care…
    Glasses emerged as a beacon of clarity amidst a world where aging individuals found themselves increasingly enveloped in a visual haze. Presbyopia, the gradual, often frustrating loss of the eyes’ ability to focus on close objects, was the bane of the aging population.
    historycooperative.org/who-invented-glasses/
     
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    Glasses - Wikipedia

    The first lenses for correcting astigmatism were designed by the British astronomer George Airy in 1825. Over time, the construction of frames for glasses also evolved. Early eyepieces were designed to be either held in place by hand or by exerting pressure on the nose . See more

    Glasses, also known as eyeglasses and spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as … See more

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    The ophthalmic frame is the part of a pair of glasses that is designed to hold the lenses in the proper position. Ophthalmic frames come in a … See more

    Precursors
    Scattered evidence exists for use of visual aid devices in Greek and Roman times, most prominently the use of an emerald by Emperor Nero as mentioned by Pliny the Elder.
    The use of a See more

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    Glasses can be marked or found by their primary function, but also appear in combinations such as prescription sunglasses or … See more

    Corrective lens shape image
    Society and culture image

    Corrective lenses can be produced in many different shapes from a circular lens called a lens blank. Lens blanks are cut to fit the shape of the frame that will hold them. Frame styles vary and fashion trends change over time, resulting in a multitude of lens … See more

    Market
    The market for spectacles has been characterized as having highly inelastic demand. … See more

     
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