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a conex lens with a focal lengh of 0.50 meter has a power of what diopter?
dealing with ophthalmology and lenses
The power of a lens in Diopters is the reciprocal of the focal length in meters:
P = 1 / .50 m = 2 Diopters
Ophthalmology Practice(lens vit.body,opthalmoscopy 2)