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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]
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]
Indian music video to cross 100 million views. [1] [2] "Swag Se Swagat" became the first Indian music video to cross 500 million views on YouTube. [3] [4] [5] "Humpty the train on a fruits ride" by "Kiddiestv Hindi - Nursery Rhymes & Kids Songs" became the first Hindi video on YouTube to cross 1 billion views on 26 December 2019 and is the most ...
Prism is the fourth studio album by American singer Katy Perry. It was released by Capitol Records on October 18, 2013. While the album was initially planned to be "darker" than her previous material, Prism ultimately became a prominently dance-inspired record. Perry worked with several past collaborators, while enlisting new producers and ...
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.
This Is How We Do. " This Is How We Do " is a song by American singer Katy Perry from her fourth studio album, Prism (2013). Perry co-wrote the track with its producers Max Martin and Klas Åhlund and recorded it in Stockholm, Sweden. The song was released as the album's fifth and final single along with its music video on July 31, 2014.
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Fixation disparity. Fixation disparity is a tendency of the eyes to drift in the direction of the heterophoria. While the heterophoria refers to a fusion-free vergence state, the fixation disparity refers to a small misalignment of the visual axes when both eyes are open in an observer with normal fusion and binocular vision. [1]