Too often chosen for their aesthetic, sunglasses do not always play their primary role: protect eyes from UVA and UVB rays.But how to choose the ones that perfectly suit your needs?
A Short Guide to survival in a world of colors and shapes
First, be aware that bright sunlight can affect your eyes.Exposure to too intense visible light can damage the retina and cause permanent vision loss. In addition, UVA and UVB rays increase the risk of cataracts, which is a gradual clouding of the lens. So you need to protect your eyes, even if the sky is overcast.
Ideally, your sunglasses should protect you from intense light of the star of day without impeding your vision. And this is where the choice is complicated. In fact, you should read the label before purchase. Do they protect against UVB rays, the most harmful? The lenses are made of glass, plastic?
Health Canada classifies sunglasses into three distinct categories.
The so-called aesthetic glasses
- Their lenses are slightly tinted.
- They block up to 60% of visible light and UV rays, depending on the color chosen and the degree of coloring.
- They filter between 87.5% and 95% of UVB rays.
- This type of sunglasses is not recommended for driving.They can not, in most cases, restrict glare attributable to the day star.
The purpose glasses
- Suitable for driving in the sun
- They block between 60 and 92% of UVA and visible light.
- The lenses, made of plastic or glass, reduce from 95% to 99% UVB.
Glasses special purpose
- They are particularly recommended for long exposure to sunlight and in a particular context, fishing for example.
- They are ideal for outings near bodies of water, the white sand beaches or during winter outings, when the sun ‘beating down “on the snow.
- They block 97 of the visible light and 98.5% of UVA.
- In addition, they filter out 99% of UVB rays.Too dark, they are not suitable for driving.
Ideally, your sunglasses should protect against blue light, the most harmful. It is that which may dazzle you during extended stays on the water or snow. They are usually gray, brown or green tint, a dark to medium intensity.
Ideally, the lenses of your sunglasses should be made of glass. You will then have to pay the price or obtain tinted glasses adjusted to your view. This material being less resistant than the plastic, it breaks more easily. In addition, these glasses are generally heavier.
Most sunglasses offer plastic lenses. You will then select those that are coated with a coating that protects from scratches.
Some plastic lenses offer a higher level of distortion. Avoid them. To determine the level, turn the chosen glasses and watch a rectangle. Move your head from bottom to top and from left to right. If the lines appear to be deformed, put the sunglasses in the display. Otherwise, they offer low distortion. Choose them!
The polarized lenses
The polarized lenses are a good choice. They protect you from glare, especially when driving.
Finally, the “mirror” lenses offer no particular advantage. Although they reflect light, but the metal coating is easily scratched.
After choosing the color and the lenses that suit you best, you need to select your future sunglasses according to your face shape.
For a round or oval face
For a round or oval face, you have only to choose from. All forms of frames and lenses are right for you.
For a square face
Your face is more square? Select a rather thin frame with round or oval lenses.
For a triangular face
For a more triangular face, “butterfly” type mounts suitable.
In addition, the frame must be proportionate to your face. Too wide, it will shrink the while, too narrow, it will expand, in addition to hurt your nose and ears.
Surprisingly, the price is not always a guarantee of quality when it comes time to choose their sunglasses. Respecting the criteria set out above, you will find excellent, offering adequate protection from several retailers, including pharmacies and big box stores. And choose a reputable brand is not necessarily synonymous with quality.
This is the level of UV protection, usually identified from 0 to 4 (four offering maximum protection), the quality of the lens and color (remember the blue spectrum) that should guide you once in your shop specialized or local pharmacy. When in doubt, consult an optician. He will advise you.
Avoid buying your next eyeglasses on the Internet, even if the offers are tempting. You might be very disappointed.
For your little cherubs quality sunglasses are also essential. Banish now those little colored plastic glasses that delight toddlers and give your offspring adequate protection. Indeed, the eyes of children and young adults are more permeable to UVA and UVB rays. These can damage the retina and create vision problems, a few years later. Only after the age of 25 that UVA rays are blocked by the lens.
Do not skimp on the protection offered by your future sunglasses. It is in your eye health.