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VLT Information - Ryders Eyewear

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VLT:
While all Ryders lenses are 100% UV the VLT or visible light transmittance can vary.
(VLT) Visible Light transmittance is the amount of light that reaches your eyes through the lenses and is measured as a percentage as shown on some Ryders styles.

Photochromic lenses have a range in transmittance as they will darken in the sun i.e. VLT: 77%-17%.


Below is a guide for choosing sunglasses based on VLT percentages.

0–19% VLT: Ideal for bright, sunny conditions.

20–40% VLT: Good for all-purpose use & varying light conditions.

40+% VLT: Best for overcast and low-light conditions.

80–90+% VLT: Virtually clear lenses for very dim and low light conditions.

LENS CATEGORIES AND DESCRIPTIONS 

Cat VLT  Description
0 80 – 100% 

Fashion spectacles—not sunglasses
Very low sunglare reduction
Some UV protection
1 43 – 80%

Fashion spectacles—not sunglasses
Limited sunglare reduction
Some UV protection
NOT SUITABLE FOR
DRIVING AT NIGHT
2 18 – 43% Sunglasses
Medium sunglare reduction
Good UV protection
3 8 – 18% Sunglasses
High sunglare reduction
Good UV protection
4 3 – 8%

Sunglasses—special purpose
Very high sunglare reduction
Good UV protection
MUST NOT BE USED
WHEN DRIVING Cat 4 Symbol