Sunglasses reflect undesirable radiation, acting as a mirror, with the metal layers of the saddle, and absorption. There are several types in turn:

  • Isochromatic lenses, or a single color. The gray, brown and dark green are those which offer greater protection.
  • Photochromatic lenses, which change color with the exposure of UV ray, darkening when the sun is higher.
  • Polarized lenses, as its name indicates, polarices light to reduce reflection and glare.

Features of sunglasses

1. Must be organic or glass, not plastic, which could deform and create optical aberrations consistent with the physical discomfort and the quality of vision.
2. The color you choose will depend on the use you’ll give them.
4. Between the saddle and glass eyes should be protected as a whole.
5. Depending on the degree of absorption of radiation, is diminished visual acuity. It is necessary to take into account that some sunglasses are not allowed to drive by reducing visibility.
6. They must include a guarantee of 6 months and an explanatory leaflet in which it was specified by the manufacturer, the characteristics of their use, the degree of protection they provide warnings and risk of their use and standards of cleanliness and maintenance.

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