Multifocal Lenses

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Multifocal spectacle lenses contain more than one optical power to provide clear vision at different viewing distances.

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Multifocal spectacle lenses contain more than one optical power to help you see clearly at different distances. Bifocals and trifocals have distinct viewing zones, while progressive lenses change power gradually.

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References (1)
  1. https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/refractive-errors/eyeglasses-refractive-errors