FAQ

What are Polarized Sunglasses?

Light reflected from surfaces such as a flat road or smooth water generally is horizontally polarized. This means that, instead of light being scattered in all directions in more usual ways, reflected light generally travels in a more horizontally oriented direction. This can create an annoying and sometimes dangerous intensity of light that we experience as glare.

Polarized lenses block this type of intense reflected light, reducing glare.

What is a TR90 Frame?

TR90 (plastic titanium) is a very strong polymer material with memory. It is currently the most popular of the ultra-light materials available. It is super tough.

What is a PC Frame/Lens?

Polycarbonate (PC) is a a strong synthetic resin. It is a lens that is impact resistant and will not shatter, an essential feature for safety in sunglasses.

What does Ultraviolet (UV) Mean?

Ultraviolet is simply one type of energy that is emitted from the sun.
Why Can’t We See UV Rays?

The only rays of the spectrum we see are visible light. Our eyes simply cannot detect the other rays due to their frequency. However just because we cannot see them does not mean we cannot feel or sense them.

Why is UV Protection Important?

We are surrounded by UV radiation all the time. The quantity depends on the conditions outside such as direct sun and the clouds.

Why Do We Need UV Protection for our Eyes?

The depletion of the earth’s ozone layer has made the need for protection from any of the sun’s rays even more important.

What do UVA, UVB and UVC Mean?

This is a further breakdown of ultraviolet rays within their component of the electromagnetic spectrum. Ultraviolet rays travel with a wavelength of 10 to 400nm. UVA has a wavelength of 320 to 400nm and causes sunburn, UVB travels in the range of 280 to 320nm, causes sunburn and kills bacteria. UVC is from 100 to 280nm and is usually filtered out by the ozone layer.

What Does UV400 Mean?

This is an optical industry standard. It means that the lenses are made to protect your eyes against UV rays up to 400 nanometers in wavelength.

How Do My Lenses Protect My Eyes from UV Rays?

A special clear filter that screens out UVR is built into the lenses – with plastic lenses this is part of the injection moulding process so it cannot wear off – the filtering effect on good quality sunglasses is therefore permanent and will not diminish with use.

“Very comfortable wrap around arms that hold the sunglasses firmly in place – nothing worse than sunglasses that jump up and down when you are running.”

Our Promise to you:

We want you to love your Le Tissier sunglasses as much as we do.
But…if it is not love at first sight we will exchange or refund them, simple as that.