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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.
Convergence insufficiency. Convergence Insufficiency. Other names. Convergence disorder. Specialty. Ophthalmology, optometry. Convergence insufficiency is a sensory and neuromuscular anomaly of the binocular vision system, characterized by a reduced ability of the eyes to turn towards each other, or sustain convergence .
These 85 mm lenses have maximum apertures of f/1.8 (left) and f/1.2 (right). In film and photography, a prime lens is a fixed focal length photographic lens (as opposed to a zoom lens ), typically with a maximum aperture from f2.8 to f1.2. The term can also mean the primary lens in a combination lens system. Confusion between these two meanings ...
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]
Japanese zoom interchangeable lens production surpassed that of prime lenses in 1982. Widespread use Kiron 28-210mm f/4-5.6 (on a Nikon FM2N) Tokina SZ-X 70-210mm f/4-5.6 SD. The need for one lens able to do everything, or at least as much as possible, was an influence on lens design in the last quarter century.
Retrieved December 14, 2022. ^ Kanter, Jake (May 10, 2024). " 'Game Of Thrones' Star Sophie Turner Headlining Amazon Prime Video Heist Series 'Haven' Alongside 'Saltburn' Breakout Archie Madekwe & 'Bodies' Actor Jacob Fortune-Lloyd". Deadline Hollywood. Retrieved May 13, 2024.