Amazon.com: Real Glass Reading Glasses with Clear Real Glass Lenses in Geek Style Frame Available in Reading Magnification +0.25 to +3.00 (0.25) : Health & Household
Premium 2 Lens Optical Metal Flipper | 0.25 or 0.50 Diopter Sphere | carrying case | Twirl Lens|lens optical|lens flipperflipper optic - AliExpress
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Scienscope 0.25x Auxiliary Lens for MZ7A Micro-Zoom Series - New York Microscope Company
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