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Contact lenses are small, light-weight plastic devices worn on the eye that correct refractive errors in vision . While they appear to be worn in direct contact with the cornea, they actually float on a layer of tears that separates them from the ...
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Clear or slightly colored plastic lenses worn directly on the eyeball to correct vision problems, held in place over the cornea by a thin layer of tears. The concept of corrective lenses that sit directly on the eyeball was developed in the ninth ...
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