Spectacles
Spectacles are the Affordable eyecare that are prescribed by optometrists to correct eye issues like nearsightedness, farsightedness and astigmatism. They are amongst the most widely used glasses in the world and are a testament to human ingenuity over hundreds of years of innovation and development.
The first optical spectacles were probably invented by the Italian friar Giordano della Spina in the thirteenth century. His invention was described in the ancient Chronicle of the Dominican Monastery in Pisa and he soon established a glass-making workshop. Initially the frames had wide rings at the ends which could be passed over a ribbon to secure them to the head, but by the early seventeenth century people who wanted both long and short sight could choose spectacles with bifocal lenses.
How to Choose the Perfect Eyeglasses for Your Face Shape
By the late nineteenth century spectacles were so commonplace that many people had two pairs and the fashion for coloured frames developed as well. In the twentieth century plastics enabled frames to be lighter and thinner than glass and designers began to offer fashionable frames bearing high-street brand names. This encouraged people to regard spectacles as desirable accessories rather than disability aids.
Some people experience discomfort anywhere that the frame touches their face and ears and this can sometimes be remedied by getting the frame adjusted. There is also a wide variety of different lens types available. Single-vision prescription lenses have a uniform refractive index, while those with myopia (nearsightedness) and hyperopia (farsightedness) can use bifocal lenses. Progressive and computer glasses have multiple lenses, while trifocals provide correction for both myopia and presbyopia, as well as reading vision.…
