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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]
Specialty. Neurology, ophthalmology. Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. [1] Also called double vision, it is a loss of visual focus under regular conditions, and is often voluntary.
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 ...
Inside the Verne. (credit: Verne) (Verne) Now Rimac has thrown its hat in the robotaxi ring, crucially a few months before Tesla and Elon Musk’s Aug. 8 debut of its taxi. Musk has been adamant ...
Eyeglass prescription. Using a phoropter to determine a prescription for eyeglasses. An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient.
The last act of the night, 9-year-old singer Pranysqa Mishra from Tampa, Fla, gave proof to her words. Her rendition of Tina Turner ’s “River Deep Mountain High” earned her Heidi Klum ’s ...
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]