A diopter is a unit of refractive power that is equal to the reciprocal of the focal length (in meters) of a given lens. This is a commonly used term in optometry to prescribe corrective lenses and is measured in steps of 0.25 diopters.
A diopter is a unit of refractive power that is equal to the reciprocal of the focal length (in meters) of a given lens. This is a commonly used term in optometry to prescribe corrective lenses and is measured in steps of 0.25 diopters.
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