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Reading glasses strength by age varies from -0.50 to 8.00 diopters.
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Reading Glasses TV News Reporter Bold Square Tortoise Frame +2.00 Lens Power | eBay
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Eye Power Prescription: Meaning, Maximum Negative Range, Tips
My roommate's glasses have the Power symbol hidden in the lens : r/mildlyinteresting
Eye Power Prescription: Meaning, Maximum Negative Range, Tips
