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A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye. Contact lenses are worn directly on the surface of the eye.
Commentators from classical antiquity to the present have often interpreted the relationship through the lens of their own cultures. In 5th-century BC Athens, the intense bond was often viewed in light of the Greek custom of paiderasteia , which is the relationship between an older male and a younger one, usually a teenager.
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