The sunglasses are a personal protective device intended to safeguard the visual system of a person from the possible risks caused by the intense solar radiation. They are also often used for purely aesthetic purposes. Prehistoric times, the Inuit wear ivory masks that block the sun’s rays reflected from the snow. Under the Roman Empire, Pliny tells that the Emperor Nero watched the struggles of gladiators through emerald. In China, the glass of smoky quartz were used in the twelfth century to protect the eyes against the glare and to hide the expressions from the eyes of the judges during the interrogation. The first glasses with lenses to filter out UVA rays [are produced in the glassworks in Murano, Venice, where the eighteenth-century copies have survived. These glasses also known as Songaah , “by gondola glass” or “glass lady” with green glass have been used by the Venetian nobility to preserve the view from the constant glare of the light on the Water of the lagoon. In the steps to follow it will be shown how to clean your sunglasses.
Eye protection is a habit crucial, especially now, in the era in which we spend so many hours every day in front of screens and computer monitors of each other.
When we buy a pair of sunglasses, they are supplied with a small cloth soft: this will be our irreplaceable tool for cleaning the glasses, both as regards the lenses that for the same frame; also it tends to be damaged with the wear, with the sweat of the skin and also, simply, is continually being handled.
Choose a good specific detergent: you can find it from your optician. Be gentle and do not spoil metal or enamelled parts. Avoid products for cleansing surfaces housewives: sometimes work, but sometimes it can also create some ugly damage! Always use the “carrying” that is given with the supplied pouch when you purchase: a perfect tissue to wipe gently avoiding however the appearance of halos on the lenses.
Gently wash your lenses with cold water (never hot, excessive heat can deform the thin plastic frames!). If necessary, you can use a drop of mild soap or hand soap, but a small drop. For long glasses need the right care and also the right wash cycle: before leaving for the holidays procured you need. Grains of sand and sunscreen not so threaten your sight and will not ruin your sunglasses.
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