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This device demonstrates optical factors related to spectacle lens fitting, suggesting improved lens performance.
A device has been developed to demonstrate the role played by each of the pertinent physical and optical factors related to the fitting of spectacle lenses. This analog device is intended to provide, graphically, a ready grasp of the interrelationships of these factors, and to show how the practitioner may manipulate them for the purpose of achieving optimum performance with any lens design.
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Bernard Grolman (1969) studied this question.
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