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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]
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]
The British Army Training Unit Suffield (BATUS) is a British Army unit located at the vast training area of Canadian Forces Base Suffield near Suffield, Alberta, Canada. [ 1 ] BATUS is the British Army's largest armoured training facility, and it can accommodate live-firing and tactical effect simulation (TES) exercises up to battle group level.
According to the report, the pipe bomb was found an hour and 40 minutes after Harris arrived at the DNC building. The report suggests it took the Secret Service 10 minutes to evacuate her, saying ...
In May, he and 40 other reservists signed an open letter declaring they would refuse to serve Israel’s war in Gaza again after the IDF launched a military offensive in Rafah, southern Gaza ...
A team of scientists estimates that there may be enough water, trapped in tiny cracks and pores of rock in the middle of the Martian crust, to fill oceans on the planet’s surface. The ...
The M1 Abrams ( / ˈeɪbrəmz /) [ 10 ] is a third-generation American main battle tank designed by Chrysler Defense (now General Dynamics Land Systems) and named for General Creighton Abrams. Conceived for modern armored ground warfare, it is one of the heaviest tanks in service at nearly 73.6 short tons (66.8 metric tons ).
July 23, 2024 at 6:15 PM. NEW YORK (AP) — The Federal Trade Commission has ordered information from eight companies that the agency says offer products and services that use personal data to set ...