A Brief Guide to Visible Light Transmission (VLT)

What is Visible Light Transmission (VLT)?

VLT refers to the percentage of visible light (380-780 nm wavelength) transmitted through a lens or transparent surface.

-High VLT (70%-100%): Ideal for low-light conditions like cloudy days or indoors.

-Low VLT (0%-20%): Suitable for bright environments like sunny outdoors.

Why is VLT Important?

-Adapt to Lighting Conditions: Low VLT reduces glare, while high VLT improves visibility in dim settings.

-Reduce Eye Strain: Optimal VLT ensures comfortable viewing and less eye fatigue.

-Protect Eyes: Low VLT lenses often include UV-blocking coatings for extra protection.

How is VLT Measured?

It's determined by measuring light intensity before and after it passes through a lens using a spectrophotometer, weighted by human visual sensitivity.

Choosing the Right VLT

Select the appropriate VLT range based on your needs:

Conclusion

Pick lenses with the right VLT for your activities and surroundings to enhance your vision and protect your eyes. I hope this helps you find the perfect lens!