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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. These are the pedophile symbols you need to know to protect ...

   www.aol.com/news/2016-04-26-these-are-the...

   One logo features blue spiral-shaped triangle surrounded by a larger triangle, represents an pedophile who is attracted to boys. A variation of this logo features rounded corners to resemble a ...

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. List of optometric abbreviations - Wikipedia

   en.wikipedia.org/wiki/List_of_optometric...

   Description ( notes ) AC. Anterior chamber. fluid-filled space between the iris and the endothelium. AC 4/4. Grade 4 anterior chamber angle. open angle between cornea and iris. AC 3/4. Grade 3 anterior chamber angle.

6. Walmart faces lawsuit over deceptive pricing after customer ...

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   A man is filing a lawsuit against Walmart claiming that numerous items were more expensive at checkout than what was advertised on the shelf. Walmart faces lawsuit over deceptive pricing after ...

7. The Walmart Prime Day deals are still going strong: Here's ...

   www.aol.com/lifestyle/the-walmart-prime-day...

   Restored Premium Dyson Supersonic Hair Dryer. $220 $350 Save $130. With this high-end supersonic hair dryer by Dyson, you'll style your hair like the pros. It's a fan favorite. $220 at Walmart ...

8. List of instruments used in ophthalmology - Wikipedia

   en.wikipedia.org/wiki/List_of_instruments_used...

   Contact lenses. to correct refractive errors of the eye; a little invasive. Phoropter. used in refraction testing. Tonometers. used to determine the intraoccular pressure (IOP) - useful in glaucoma; video link for various types of tonometers. Speculum: to keep the eyes open during any operation. Universal eye speculum.

9. All the best Prime Day deals to shop for your grandkids while ...

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   Apple AirPods (2nd Generation) $80 $129 Save $49. A bit of a "big kid gift" but at this outrageous price for AirPods, you can feel good about such a high-tech gift for younger kids. $80 at Amazon ...