What are FL Sun TheraSpecs' visible light transmission (VLT)?

FL-Sun® TheraSpecs are available in two different tint strengths:

Dark+ blocks 90% of light
Ultradark+ blocks 96% of light

These dark, protective lenses are polarized to deflect glare and designed to be worn outside to help shield you against bright sunlight.

Note: FL-Sun Dark+ strength can be worn for driving during the day. Due to its extremely dark lenses, FL-Sun Ultradark+ strength is not suitable for driving any time of day.