Fog on your glasses lenses - Blue Light Glasses

We have all experienced this, you walk from the cold street into a warm cafe and suddenly your glasses fog up. 

I can be very annoying and inconvenient especially if you don't have a cloth to hand.

So why does this happen and how can we prevent it. 

It is caused by condensation, when water vapour in the air hits a cold surface (the lenses) it causes the vapour to cool and turn into a liquid film on your lens. 

The same can occur with your breath when going from cold to warm environment as your breath will also be warmer than the lenses. 

Another typical example is if you open an oven door. 

The best way to deal with this is to make sure the anti reflective coating you get on your glasses also has anti fog properties. 

Anti fog coatings work by spreading the water droplets that form on the lens uniformly across the entire lens so that they are not noticeable to the wearer. 

At Sapphire Eyewear all our prescription and non-prescription glasses come with anti blue light lenses as standard. You can check out our collection of blue light glasses here. 

Our blue light glasses come with a 14 day return period if you are not 100% happy with your glasses.