
Spectacles belong to the most ancient inventions in cultural history. Their development, however, cannot be regarded as final. New impetus has resulted in the creation of non-spherical lenses and, through the development of refractive lenses, in a more progressive optic effort.
Optics and Photonics, Eyeglasses, Humans, Refraction, Ocular, Refractive Errors
Optics and Photonics, Eyeglasses, Humans, Refraction, Ocular, Refractive Errors
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