Do you know that the sun overexposure can cause eye problems such as photokeratitis (corneal injury) or favour the development of cataracts or macular degeneration? The election of appropriate sunglasses is not only a matter of fashion, but a matter of visual health. Biòptic provides you with 5 advices in order to get right with your choice:
1. UV protection glasses:
It is essential to check the UV, ultraviolet rays abbreviation, grade. The need of more or less protection will depend on the glasses usage. During the summer, it is necessary a protection grade between 81% and 92% of absorption, which is adequate for a medium and high sun brightness.
Glasses must be used at all hours, since the UV rays, even though they are imperceptible, these are also present when cloudy days. Generally this information is indicated on the glass sticker.
2. Which type of glass must be chosen?
–Polarized: this is the glass that protects the most par excellence. All the residual reflections are avoided with the polarized filtre.
–Sunsitive: these glasses are used by sportsmen that play activities where they move from direct light to shadow; the glass varies its tone depending on the quantity of light.
–Degraded: the most chosen glasses because of aesthetics reasons; the tone of these glasses is more clear gradually. That is, the upper part is darker and the lower part is more clear. These are adequate to wear indoor and when it is not very sunny.
–Uniform: the colour of the glass is uniform and this is the most usual way we find sunglasses.
3. A frame that protects the eyes from all angles:
–The large variety of frames makes us choose the best one according to our face shape in order not to leave any crack where the sun can get into and also that these suit us:
–Heart shape face (wide forehead and pronounced chin): the aviator style of glasses is recommended.
–Square face (wide forehead and jaw): the glasses that are recommended in order not to give too much protagonism to the forehead are the oval glasses or those that do not have the upper line straight.
Round face (wide forehead and voluminous cheeks): one must not choose round shapes and select rectangular ones, which are glasses that are wide in the upper part and narrow in the inferior one.
4. Children, the most vulnerable to sun:
Do you know that it is not until the age of 12 that the crystalline is completely formed and the retina is not yet protected? In the same way that we protect children’s skin from the sun, we must also protect their eyes. Special care must be taken into account when protecting their vision.
5. Optician’s as quality filtres:
The best way to choose sunglasses is consulting experts. That is why going to the optician’s to find the sunglasses for this summer means a secure purchase. Listen to experts’ advice.