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Glasses (also called eyeglasses or spectacles) are frames bearing lenses worn in front of the eyes, normally for vision correction, eye protection, or for protection from UV rays. Modern glasses are typically supported by pads on the bridge of the nose and by temple arms placed over the ears .
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.
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]
For water sports, so-called water sunglasses (also: surf goggles or water eyewear) are specially adapted for use in turbulent water, such as the surf or whitewater. In addition to the features for sports glasses, water sunglasses can have increased buoyancy to stop them from sinking should they come off, and they can have a vent or other method ...
Photos of Roosevelt wearing the glasses led to the initial popularization of rimless eyeglasses amongst Americans in the early 1900s. Rimless glasses were first widely offered as pince-nez , with manufacturers arguing that the design was superior to extant eyeglasses because it secured the lenses directly to the nose and kept them in place.
The Gaussian theory, however, is only true so long as the angles made by all rays with the optical axis (the symmetrical axis of the system) are infinitely small, i.e., with infinitesimal objects, images and lenses; in practice these conditions may not be realized, and the images projected by uncorrected systems are, in general, ill-defined and ...
Woman wearing cat eye glasses in the 1960s Dr. Otto Wichterle wearing a male version of cat eye glasses. Cat eye glasses (sometimes called "cat eyes" or "cat glasses") are a shape of eyewear. The form is closely related to the browline style, differentiated by having an upsweep at the outer edges where the temples or arms join the frame front.
Eyeglasses wearers who intend to wear their glasses when using binoculars should look for binoculars with an eye relief that is long enough so that their eyes are not behind the point of focus (also called the eyepoint). Else, their glasses will occupy the space where their eyes should be.
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