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The mounting of two half-lenses into a single frame led to a number of early complications and rendered such spectacles quite fragile. A method for fusing the sections of the lenses together was developed by Louis de Wecker at the end of the 19th century and patented by John Louis Borsch Jr. (1873–1929) [ 9 ] in 1908.
Specsavers Optical Group Limited [1] is a British multinational optical retail chain, which operates mainly in the UK, Ireland, Australia, New Zealand, Canada, and the Nordic countries. The chain offers optometry and optician services for eyesight testing and sells glasses , sunglasses , and contact lenses .
Man with glasses. A woman with glasses. Glasses, also known as eyeglasses or spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears for support.
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The second style, which was developed in the 1890s, was the most elaborate, consisting of a frame with a raised edge-like extension known as the gallery. [2] The gallery was designed to help secure the monocle in place by raising it out of the eye's orbit slightly so that the eyelashes would not jar it.
[2] [3] Opto-mechanical spectacles allow focus control by the wearer via movement of a small slider located on top of the bridge. The user adjusts the lens for optical clarity at the desired distance. [4] They are a combination of rigid and flexible lenses that can change prescription to enable sharp focus at various distances (from infinity up ...
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