THE SCI­ENCE BIT

Trail Running (UK) - - Sunglasses Test -

The Vis­i­ble Light Trans­mis­sion (VLT) of a lens is the amount of light let through the lens. Cat­e­gory 0 lenses are clear and let through up to 100%; cat­e­gory 4 are very dark and let through be­tween 3-8%; th­ese are used in snow and around wa­ter.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.