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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. Prism fusion range - Wikipedia

   en.wikipedia.org/wiki/Prism_fusion_range

   The prism fusion range (PFR) or fusional vergence amplitude is a clinical eye test performed by orthoptists, optometrists, and ophthalmologists to assess motor fusion, specifically the extent to which a patient can maintain binocular single vision (BSV) in the presence of increasing vergence demands. Motor fusion is largely accounted to ...

4. Fireplace insert - Wikipedia

   en.wikipedia.org/wiki/Fireplace_insert

   A fireplace insert is a device that can be inserted into an existing masonry or prefabricated wood fireplace. Fireplace inserts are invariably made from cast iron or steel. Typically, fresh air enters through vents below, circulates around the main chamber, where it is heated up, then exits through the chimney.

5. Prism cover test - Wikipedia

   en.wikipedia.org/wiki/Prism_Cover_Test

   measuring strabismus. 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]

6. Paris Hilton Shares Adorable Video of Son Phoenix Playing ...

   www.aol.com/paris-hilton-shares-adorable-video...

   Paris Hilton is impressed by her son Phoenix’s throwing skills!. On Sunday, Sept. 22, the media personality, 43, posted an adorable clip of her 20-month-old son Phoenix playing a game of ball ...

7. Book Review: 'Secret Life of the Universe' is a primer on ...

   www.aol.com/news/book-review-secret-life...

   In “The Secret Life of the Universe: An Astrobiologist's Search for the Origins and Frontiers of Life,” readers won't walk away with a clear-cut answer to that question. Cabrol writes that we ...