Polarised clip on sunglasses
Clip-on sunglasses, simply clips on to your existing prescription spectacles.
Spring clip allows the lens to be raised and lowered as required.
Conform to BSEN 1836 (1997) and give full protection against the harmful effects of sunlight. 

UVA & UVB. 400 filter, category 3 Grey
UVA & UVB. 400 filter, category 2 Brown.
UVA & UVB. 400 filter, category 2 Pink

Our clip on Sunglasses are available in two lens sizes.
LARGE LENS - Dimensions 55mm x 60mm
SMALL LENS - Dimensions 40mm x 55mm

Technical information on sunglasses filter categories.
There are 5 filter classifications for sunglasses: 1, 2, 3, 4, 5
The number is an indicator as to how much light passes through the lens.
Category 0 will allow 80 - 100%
Category 1 will allow 43 - 80%
Category 2 will allow 18 - 43%
Category 3 will allow 8 - 18%
Category 4 will allow 3 - 8%
Categories 0 and 1 are used mainly for fashion. They don't significantly reduce bright glare.
Category 2 is for sunny weather and driving.
Category 3 is for bright sunlight, driving and general purpose wear.
Category 4 is for very bright conditions and should not be worn whilst driving or operating machinery.