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Power of a Lens: Measuring Lens Strength and Prescription Explained

Power of a lens is a measure of how strongly the lens converges or diverges light. It is the reciprocal of focal length in meters. A lens with power of +2

TL;DR: Power of a lens is a measure of how strongly the lens converges or diverges light. It is the reciprocal of focal length in meters. A lens with power o…

By Syllab.in · Updated Jun 17, 2026

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