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2. Magnifying glass - Wikipedia

   en.wikipedia.org/wiki/Magnifying_glass

   A magnifying glass is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle. Beyond its primary function of magnification, this simple yet ingenious tool serves a variety of purposes. It can be employed to focus sunlight, harnessing the Sun's rays to create a concentrated hot ...

3. Video magnifier - Wikipedia

   en.wikipedia.org/wiki/Video_magnifier

   Video magnifier. Video magnifiers are electronic devices that use a camera and a display screen to perform digital magnification of printed materials. The display screen is usually LCD or a similar flat-screen technology (although older video magnifiers have used CRT displays), and the device usually includes a lamp to illuminate the source ...

4. Loupe - Wikipedia

   en.wikipedia.org/wiki/Loupe

   Loupe. A photographic loupe for examining film and prints. A loupe ( / ˈluːp / LOOP) is a simple, small magnification device used to see small details more closely. [ 1] They generally have higher magnification than a magnifying glass, and are designed to be held or worn close to the eye. A loupe does not have an attached handle, and its ...

5. 'Makes a HUGE difference': If you struggle to see small print ...

   www.aol.com/lifestyle/magnipros-book-magnifier...

   This reading magnifier makes it easier to see books, newspapers, and so much more. (Photo: Amazon) "Love it!" one customer raved. "The packaging seems to be geared toward seniors. I’m only 50 ...

6. Magnification - Wikipedia

   en.wikipedia.org/wiki/Magnification

   By convention, for magnifying glasses and optical microscopes, where the size of the object is a linear dimension and the apparent size is an angle, the magnification is the ratio between the apparent (angular) size as seen in the eyepiece and the angular size of the object when placed at the conventional closest distance of distinct vision: 25 ...

7. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.