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 |
1 | 43 – 80% |
Fashion spectacles—not sunglasses |
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 |