As eye care professionals we really don't want to blind you with science, so get your Polaroid shades on.

Q: How do you curve a lens?

Most sunglass lenses are curved. Some gently. Some dramatically. Getting the right amount of curve into a lens is not that difficult. Getting a curve into a lens while retaining its optical clarity however, is notoriously tricky. Until recently it was impossible. Until Polaroid gave it a go.

Traditional manufacturers use 'vacuum-forming' to curve their lenses. This technique results in lenses which temporarily warp your perception of sizes, shapes and distances. This distortion is subtle and takes place often without you even realizing - things just aren't quite how they seem.

And since your eye is forced to compensate for the lenses' sub-standard optical performance, you are at huge risk of eye strain if you wear poor quality sunglasses.

A: Cleverly

We've developed some cool lens technology that gives clearer, truer vision with no shape-shifting side-effects. We call it PTX4000. (OK so the name could be catchier, but this is the lens geeks page).

It's a unique press-polishing manufacture process which optically fine-tunes the lens while curving it. Polaroid's press polishing technique creates lenses which are optically perfect, allowing the eye and the wearer to relax.

Distortion is a thing of the past with Polaroid lenses.