The heatwave explained by Varionet

What is the heatwave?

A heat wave is defined as a level of very high heat during the day and night for at least three consecutive days . The definition of a heat wave is therefore based on two parameters: heat and duration.

What are the risks associated with the heat wave?

If you are exposed to high heat for too long you risk severe fatigue , dehydration or heat stroke , see hyperthermia .

The most fragile people and those most exposed to heat are particularly at risk .

Vuarnet and sunglasses: a long story!

The famous brand of glasses Vuarnet was not born from the last rain! She has a long and beautiful story behind her and it is far from over. Vuarnet was created in the 1950s under the impetus of its creator Roger Pouilloux .

Sunglasses and winter driving

Sunglasses are one of the must-have summer accessories, but we tend to forget about them in the winter. However, protecting yourself from UVA and UVB rays is just as important during the cold season. In addition to protecting our eyes and appendages from sun damage, wearing sunglasses can help us be better drivers , creating a safer world for everyone on the roads.

On the way to the holidays

Summer holidays are coming and so are long car journeys… everyone wants to rest from the difficult past year! And the travel time, the many traffic jams are tiring and even dangerous. But a trip is being prepared, which is why every year many associations recommend that users do certain checks before departure.

sunglasses day

A few days after the start of summer, on June 27, in the United States and Canada, National Sunglasses Day is celebrated each year. This day was created by the Vision Council which dedicates a site to it

Why a National Sunglasses Day?

This day is a simple and fun way to remind the American population of the importance of sun protection . It is necessary to protect yourself from glare, solar and UV radiation as well as the dangers associated with exposure to the sun. UV radiation (especially UVA) is harmful to the eyes and the skin, which is why it is strongly recommended to wear sunscreen to prevent burns, degeneration, cancer, etc.

During strong and long exposure, UV can cause problems in the white of the eye, keratitis, cataracts, retinal damage... In addition, sunscreens are an active anti-wrinkle! Your protected eyes are relaxed; fewer wrinkles and fine lines appear at the corner of the eyes. In addition, by blocking UV rays, your eyelids, whose skin is thin and sensitive, are protected, less risk of cancer.

Which sunglasses to choose?

Here are some tips for choosing the best sunglasses:

- Check that they provide good UV protection, 100% UV or UV400 protection

- Choose a category suited to its use: cat.4 for high mountains or sailing, cat.2 for moderately sunny weather... For summer activities, driving, cat.3 sunglasses are ideal and master key.

- Prefer a pair of comfortable sunglasses that do not slip, large and covering.

- And of course opt for nice looking glasses!

Take the opportunity to offer or you sunglasses and do not hesitate to share your photos on our instagram or facebook pages

Protect your eyes in the mountains

In the mountains, in winter, whether you are skiing or snowshoeing, sun protection is essential for the skin, but also for the eyes .

Effects of altitude on vision

In elevation , the reverberation increases the luminosity , which generates a significant discomfort (glare).
A cloudy sky absorbs the brightness but allows 90% of UV to pass through . As for your skin, these harmful rays can cause real "sunburn" (ophthalmia of the eyes*), but also affect the cornea (cataract) and the retina (AMD).

In fact, UV rays are less filtered by the atmosphere: the higher the altitude, the greater the amount of UV . In addition, the sun is reflected on the snow, a very reflective surface, because it reflects 80 to 95% of UV rays (while in comparison, sand only reflects 20%).

Glasses in the mountains

The choice of your glasses in the mountains:
 A curved frame , covering but ventilated (to avoid fogging).
 A lens with good optical qualities (no deformation), impact resistant, category 3 or 4 (so as not to be dazzled). There are photochromic lenses, which allow you to go from category 3 to 4, or 2 to 4. The lenses can be treated anti-reflection on the inside to eliminate dazzling reflections. Finally, one can consider the use of polarizing lenses .
– The color of the glass provides a visual effect:
Grey: for all weather
Yellow-orange: for days with dazzling sunshine
Brown: for cloudy days (increases contrast and provides better perception of relief and depth of field)
The color of the glass is not a guarantee of protection: only 100% UV protection guarantees optimal protection .

Watch out for children!

As for their skin, finer and more fragile, you have the total screen reflex, do not skip wearing glasses or a mask.

Glasses for Christmas!

The Christmas holidays are fast approaching… Short of gift ideas?

Why not offer your loved ones, or yourself, a pair of glasses ?

Recognize an authentic pair of Ray-Bans

It is sometimes difficult to differentiate between Ray-Ban copies and originals ! Indeed, for several years RB has been the fashionable brand that everyone is snapping up; this is why it is widely copied and reproduced to be resold on the beaches or in the various tourist markets. Through this article we will give you some tips that will be useful for you to identify a real pair of Ray-Ban .

Protect your eyes with polarized lenses

the polarizing lens is the ideal sun protection for the eyes, both in an urban context and in beach or mountain environments.

Sun and prevention

Ultraviolet radiation is the guarantee of our morale and the quality of our tan. The UV necessary in small doses, for our joy of living, our energy as much as for the synthesis of vitamin D , can become harmful to greater or lesser degrees: from simple sunburn in the eyes to the appearance of a cataract. The sunburn is fast. We have all experienced it when taking the path that leads us to the market on a summer Saturday, sitting on the terrace of a café or taking our children for a walk in the park. We didn't really expose ourselves, yet the sunburn was already on our bare shoulders, our neck, our legs and also on our eyes, which we often forget .


Unlike infrared rays whose effects are immediate: heat, burns, etc. Those of ultraviolet rays are expressed late. Eyelid, retina, cornea, lens may suffer from prolonged exposure. In order to protect your vision , which is part of your five senses, we advise you all to wear sunglasses adapted to your activity : running, fishing, hiking, tanning …

There is the sky, the sun and my eyes.


There is the sky, the sun and my eyes .

Lying on the sand, the sun in my eyes, slathered in total screen, I take advantage of the summer that is coming back.

Did I forget anything? Nope !