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Other additives used in crown glasses include zinc oxide, phosphorus pentoxide, barium oxide, fluorite and lanthanum oxide. The crown/flint distinction is so important to optical glass technology that many glass names, notably Schott glasses, incorporate it. A K in a Schott name indicates a crown glass (Krone in German).
Ocular myasthenia gravis (MG) is a disease of the neuromuscular junction resulting in hallmark variability in muscle weakness and fatigability. MG is an autoimmune disease where anomalous antibodies are produced against the naturally occurring acetylcholine receptors in voluntary muscles.
ChatGPT is a chatbot and virtual assistant developed by OpenAI and launched on November 30, 2022. Based on large language models (LLMs), it enables users to refine and steer a conversation towards a desired length, format, style, level of detail, and language.
These reflections are used to determine the size and shape of a ring in the retina which is located in the posterior part of the eye. By measuring this zone, the autorefractor can determine when a patient's eye properly focuses an image. The instrument changes its magnification until the image comes into focus.
Principle of the periscope. The periscope on the left uses mirrors whereas the right uses prisms. a Mirrors b Prisms c Observer's eye Principle of the lens periscope. The two periscopes differ in the way they erect the image. The left one uses an erecting prism whereas the right uses an erecting lens and a second image plane. a Objective lens b ...
Using the memory confusion protocol, they presented subjects with pictures of individuals and sentences, allegedly spoken by these individuals, which presented two sides of a debate. The errors that the subjects made in recalling who said what indicated that they sometimes mis-attributed a statement to a speaker of the same race as the "correct ...
Mia Khalifa (/ m iː ə k ə ˈ l iː f ə /; Arabic: ميا خليفة Miyа̄ Ḵalīfah [mijaː χaliːfa(h)]; born 1993 [1]) is a Lebanese-American media personality and former pornographic film actress and webcam model.
The Photomic series of prisms, which was initially designed with a direct coupled-metering CdS photocell (2 models were produced). The Photomic prism head later evolved to include the Photomic T with TTL in 1965, a behind-the-lens metering prism head which metered an averaging pattern of the focusing screen.