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2. Magnifying glass - Wikipedia

   en.wikipedia.org/wiki/Magnifying_glass

   Magnifying glasses typically have low magnifying power: 2×–6×, with the lower-power types being much more common. At higher magnifications, the image quality of a simple magnifying glass becomes poor due to optical aberrations, particularly spherical aberration. When more magnification or a better image is required, other types of hand ...

3. Presbyopia - Wikipedia

   en.wikipedia.org/wiki/Presbyopia

   Myopes considering refractive surgery are advised that surgically correcting their nearsightedness may be a disadvantage after age forty, when the eyes become presbyopic and lose their ability to accommodate or change focus, because they will then need to use glasses for reading. Myopes with low astigmatism find near vision better, though not ...

4. Vision rehabilitation - Wikipedia

   en.wikipedia.org/wiki/Vision_rehabilitation

   Vision rehabilitation (often called vision rehab) is a term for a medical rehabilitation to improve vision or low vision.In other words, it is the process of restoring functional ability and improving quality of life and independence in an individual who has lost visual function through illness or injury.

5. These Stylish, Doctor-Approved Reading Glasses Can Help ... - AOL

   www.aol.com/best-doctor-approved-reading-glasses...

   When reading glasses are made to your unique prescription and measured for your eyes, the quality of vision is far superior compared to OTC reading glasses, adds Caroline Cho, O.D., optometrist at ...

6. Visual impairment - Wikipedia

   en.wikipedia.org/wiki/Visual_impairment

   There is no high-quality evidence on the effect of assistive technologies on educational outcomes and quality of life in children with low vision as of 2015, [104] nor is there evidence on magnifying reading aids in children. [105] Low-vision rehabilitation does not appear to have an important impact on health-related quality of life, though ...

7. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Higher-quality optical-grade glass materials exist (e.g. Borosilicate crown glasses such as BK7 ( n d = 1.51680 , V d = 64.17 , D = 2.51 g/cm³ ), which is commonly used in telescopes and binoculars, and fluorite crown glasses such as the best optical quality low dispersion glass currently in production, N-FK58 made by the German company Schott ...