Broken Antique

Broken Antique

Well, that is my previous frame less spectacles which had served me well for the last 4 to 5 years. Yes, a long time but I love it. It finally broke and to some of my friends, a real relieve. The spectacles was made from component of titanium and it can bend well without breaking. The fashion at the time I bought it was to have a very slim and thin arms while now, the fashion is to have the frame thick and bold. The photo was added with noise blended with colour burn in photoshop.

Modern glasses are typically supported by pads on the bridge of the nose and by temples placed over the ears. Historical types include the pince-nez, monocle, and lorgnette.

Glasses frames are commonly made from metal, horn or plastic. Lenses were originally made from glass, but many are now made from various types of plastic, including CR-39 or polycarbonate. These materials reduce the danger of breakage and weigh less than glass lenses. Some plastics also have more advantageous optical properties than glass, such as better transmission of visible light and greater absorption of ultraviolet light. Some plastics have a greater index of refraction than most types of glass; this is useful in the making of corrective lenses shaped to correct vision abnormalities such as myopia, allowing thinner lenses for a given prescription. Scratch-resistant coatings can be applied to most plastic lenses giving them similar scratch resistance to glass. Hydrophobic coatings designed to ease cleaning are also available, as are anti-reflective coatings intended to improve night vision and make the wearer's eyes more visible.

Polycarbonate lenses are the lightest and most shatterproof, making them the best for impact protection. Polycarbonate lenses offer poor optics because of a low Abbe number of 31. CR-39 lenses are the most common plastic lenses, due to their low weight, high scratch resistance and low transparency for ultra violet and infared radiation.

Rimless

Rimless and semi-rimless glasses are common variations that differ from regular glasses in that their frames do not completely encircle the lenses. Rimless glasses have no frame around the lenses; the bridge and arms are mounted directly onto the lenses. Semi-rimless (or half-rimless) glasses have a frame that only partially encircles the lenses (commonly the top portion).^[2]

Glazing

Spectacle lenses are edged into the frame's rim using glazing machines operated by ophthalmic technicians. The edgeing process begins with a trace being taken of the frame's eye shape. In earlier days the trace was replicated onto a plastic pattern called a Former. Nowadays the process is patternless and the shape is sent to the edger electronically.

The lens, in the form of a round uncut, is positioned in the correct manner to match the prescription and a block is stuck to the lens and that block fits into a chuck in the edgeing machine. A diamond coated wheel spins and the edger replicates the frame's eye-shape to the uncut. A 'v' bevel is applied to allow the edge of the lens to fit into the frames rim.

(courtesy of wikipedia.com)