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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]
List of most-viewed Pakistani YouTube videos. "Zaroori Tha" by Rahat Fateh Ali Khan is the most-viewed Pakistani video on YouTube. It is also the first Pakistani video to reach 1 billion views. On the American video-sharing website YouTube, "Tajdar-e-Haram" sung by Atif Aslam became first Pakistani music video to cross 100 million views.
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]
Strabismus. Strabismus is a vision disorder in which the eyes do not properly align with each other when looking at an object. [2] The eye that is pointed at an object can alternate. [3] The condition may be present occasionally or constantly. [3]
Editing by Gerry Doyle) Mexican authorities said on Thursday they were searching at sea and on land for two Australians and one American reported missing in Baja California, one of the country's ...
Prism (optics) An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base and rectangular sides.
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.
Since then, about 430 channels have exceeded 10 billion total views as of May 2024. T-Series became the most-viewed YouTube channel of 2016, [10] [11] [12] and exceeded 14 billion total views by January 2017. [13] It eventually surpassed PewDiePie to become the most-viewed YouTube channel of all time by February 16, 2017, [14] and currently ...
"Me at the zoo" is a YouTube video uploaded on April 23, 2005. It is the first video to be uploaded to the platform. The 19-second video features YouTube's co-founder Jawed Karim, who was 25 years old at the time, in front of two elephants at the San Diego Zoo in California, noting their long trunks. It was recorded on Karim's camera by his ...
Ophthalmology. In ophthalmology, horror fusionis is a condition in which the eyes have an unsteady deviation, with the extraocular muscles performing spasm-like movements that continuously shift the eyes away from the position in which they would be directed to the same point in space, giving rise to diplopia. Even when the double vision images ...