If the lens and cornea already provide natural filtration, wearing sunglasses prevents glare and also protects against hazards invisible to the naked eye: ultraviolet and blue light. In addition, the glasses retain physical aggressions such as wind, sand, dust, pollen …
Prevent cataracts and AMD
The cornea, which is located on the surface of the eye, absorbs part of the UV rays received, protecting the lens and retina. But too much exposure can cause keratitis, a corneal ulceration that causes a burning sensation and sand in the eyes. Rarer but very painful, ophthalmia is a real “sunburn” caused by very high exposure. The risk is high in the mountains.
The lens is behind the cornea and iris (which gives color). It is very sensitive and also absorbs a large part of the UV rays. The more your eyes are exposed, the faster the lens ages and becomes more opaque. It is cataract, very common after 65 years.
Finally, the retina, which covers the back of the eye, is the most sensitive to UV rays. After 50 years, the most common visual impairment can occur: age-related macular degeneration.
Which frame do you choose for sunglasses?
Depending on the intended use – in the city or the sea, for sports or tourism – we do not choose the same frames.
- For the more athletic: ultra-resistant and light glasses. Titanium, carbon fiber and nylon are light, strong, flexible and designed for long-term use.
- For fashion frames: Cellulose acetate, of natural origin and with a wide variety of shapes and colors, is used by luxury brands. Wood, environmentally friendly, has been very trendy for several years. Plastic is most common. They are available in a very wide variety of colors and patterns. These are the cheapest sunglasses, but their lifespan is affected.
Buy better at an optician or in a sports store than in supermarkets. You then have the choice between a pair of designer glasses, for which you pay for the work of the design, but also the brand (Chanel, Dior, Tom Ford, Ray Ban …) and that of a specialized manufacturer with an emphasis on technical details, the quality of materials, the search for performance but also for aesthetics (Vuarnet, Bollé, Oakley, Carrera …).
For the choice of material, the color of the glasses and the sun’s rays, we tell you everything in the slideshow above.
- Don’t forget to replace your sunglasses every 2 years
- The 4 enemies hidden from your eyes
- Glasses with blue light filter, a lie?