How to choose your sunglasses?
How to choose your sunglasses? |
Sunglasses, simple fashion accessories
or glare protection? No ! Sunglasses are designed to filter UV rays that are
harmful to your eyes. If you don't protect yourself properly, you could burn
your eyelids or cornea, hurt your eyes, or damage your eyesight. The harmful
effects of UV rays are pernicious because they are not necessarily felt and can
be measured over the long term.
By choosing the wrong glasses, you are doing worse than good
Watch out for fakes. The material used
can pass UV rays, even if the lenses are tinted. Tinted lenses that don't
filter UV rays don't protect your eyes at all. On the contrary ! When it is
sunny, the pupil is more dilated than in daylight because of the darkening
caused by tinted glasses. UV rays then directly reach the retina. Therefore, it
is worse for your health to wear bad glasses than not to wear them at all in a
sunny environment. To ensure the quality of your prescription glasses, it is best to
go to an optician.
Choosing the best UV protection
The UV standard of the European
Community divides sunglasses into 5 categories, ranging from classes 0 to 4
according to the percentage of rays filtered (class 4 including ski goggles for
intense sunlight, with more than 90% filtration ).
Make sure that the color class and
intensity of your glasses are appropriate for the level of sunlight, your
activity and the environment. For example, class 4 glasses let less light
through and are therefore more dangerous for driving. Also consider that the
goggles can be adapted to certain conditions, for example sunglasses for
skiing.
If it has UV-400 on the glasses, you are
making sure that your sunglasses will block out harmful rays. Indeed, the
mention UV400 guarantees that 100% of ultraviolet rays are filtered (UVA, UVB
and UVC).
Choose the right lens color
The color of the lenses depends on the
situation and on a possible refractive error. Nearsighted people are advised to
choose brown glasses and green glasses for farsighted people. As for gray, it
is suitable for everyone because it respects color vision. The yellow gives it
a good perception of depths and accentuates the contrasts.
Gray lenses: faithful reproduction of colors, recommended for driving.
Brown lenses: warm and improve contrasts
(they are more suitable for myopic people). Good protection in all
circumstances.
Green colored lenses: better protect against glare.
- Yellow or orange lenses: improve visibility of contrasts in foggy or low light conditions.
- Blue or purple lenses: provide protection when the sun is moderate.
- Pink or red lenses: indicated only in low light.
- Choosing the right lens treatment
You can have your glasses surface treated:
Anti-reflection treatment: ideal for
driving because it reduces the reflection of rays towards the eyes. It is
usually performed only on the inner side. There is no point in doing this on
the outside since the purpose of sunglasses is to reduce the entry of light.
Mirror treatment: particularly suitable
for the mountains because it reduces reverberation and glare.
Anti-scratch treatment: indicated for
sports or travel because it is resistant to friction and of course to
scratches.
Now you already have the knowledge and
are ready to buy your sunglasses!
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