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2. Prism correction - Wikipedia

   en.wikipedia.org/wiki/Prism_correction

   Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

3. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Corrective lens. A pair of contact lenses, positioned with the concave side facing upward. 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.

4. Prism cover test - Wikipedia

   en.wikipedia.org/wiki/Prism_Cover_Test

   The prism cover test ( PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]

5. Here are the best 'As Seen on TV' items under $25 at Walmart

   www.aol.com/lifestyle/best-seen-tv-items-under...

   The flexible Ruby Sliders slip onto most furniture legs and stay firmly in place. At the bottom of each is a felt disc that won't scratch your flooring even as your heavy furniture shifts. The ...

6. George M. Stratton - Wikipedia

   en.wikipedia.org/wiki/George_M._Stratton

   George M. Stratton. George Malcolm Stratton (September 26, 1865 – October 8, 1957) was an American psychologist who pioneered the study of perception in vision by wearing special glasses which inverted images up and down and left and right. He studied under one of the founders of modern psychology, Wilhelm Wundt, and started one of the first ...

7. Best As Seen on TV Products of 2010 - AOL

   www.aol.com/news/2010-12-23-best-as-seen-on-tv...

   Here is my list of the best As Seen On TV products I tried out in 2010. Drumroll please ..... I've taken dozens of As Seen on TV products for a spin this year. Some failed to impress, while others ...