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Didymium glasses. Didymium (Greek: δίδυμο, twin) is a mixture of the elements praseodymium and neodymium.It is used in safety glasses for glassblowing and blacksmithing and filter lenses for flame testing, especially with a gas ()-powered forge [why?], where it provides a filter that selectively blocks the yellowish light at 589 nm emitted by the hot sodium in the glass without having a ...
Freddie Freeman — Typically wore contact lenses throughout his career, but occasionally wore glasses in 2012. [8] Opted to get LASIK in 2017. [9] Atsuya Furuta; Randal Grichuk; Johnny Grubb; Chick Hafey; Jerry Hairston; Bryce Harper — Typically wears contact lenses, but wore prescription eyeglasses in 2018. [10] Enrique Hernández; Frank ...
In some lenses, the curved surfaces are replaced with flat surfaces, with a different angle in each section. Such a lens can be regarded as an array of prisms arranged in a circular fashion with steeper prisms on the edges and a flat or slightly convex center. In the first (and largest) Fresnel lenses, each section was actually a separate prism.
The first half of the 18th century saw British optician Edward Scarlett perfect temple eyeglasses which would rest on the nose and the ears. The innovations presented by Scarlett would not only spark some to look at aesthetic customization of eyewear for fashion within Europe but also lead Benjamin Franklin to invent bifocals in colonial America. [12]
Between 2010 and 2017, a total of eight men disappeared from the neighbourhood of Church and Wellesley, the LGBTQ village of Toronto, Ontario, Canada.The investigation into the disappearances, taken up by two successive police task forces, eventually led to Bruce McArthur, a 66-year-old self-employed Toronto landscaper, whom they then arrested on January 18, 2018.
Men is a 2022 British folk horror [4] film written and directed by Alex Garland. It stars Jessie Buckley as a widowed woman who travels on holiday to a countryside village but becomes disturbed and tormented by the strange men in the village, all portrayed by Rory Kinnear .