All Fuse Lenses, including our clear options, provide 100% UVA/UVB protection up to 400nm (UV400). In addition to our polarized and color-enhancing sunglass lines, we offer specialty Clear Blue Light and Photochromic (Light-to-Dark) replacement lenses designed for all-day eye comfort, digital protection, and light adaptability.

Specialty Lens Types & Core Features

Blue Light Filtering Technology

• Targeted Filtering (35.6% Blockage): Our clear blue light lenses selectively block 35.6% of blue light radiation.

• Why Not 100% Blue Light Blocking? Blocking 100% of the blue light spectrum would distort natural color perception and impair depth vision. Our 35.6% filtering level provides the ideal balance between visual clarity and eye fatigue relief.

• Relief From Screen Strain: Reduces common symptoms of digital overexposure from computer, phone, and TV screens, including tension headaches, blurred vision, eye fatigue, and disrupted sleep cycles.

Complete UV400 Protection Explained

All Fuse Lenses provide 100% protection against both UVA and UVB rays up to 400 nanometers (UV400).

• UVA Radiation (320–400 nm): Accounts for 95% of UV radiation reaching Earth. Penetrates deeply into the eye, contributing to long-term conditions like cataracts and macular degeneration.

• UVB Radiation (290–320 nm): Shorter, higher-energy rays responsible for sunburns, photokeratitis (corneal sunburn), and eye surface growths (pingueculae and pterygia).

• Constant Protection: Because UV rays penetrate cloud cover and reflect off water, sand, and snow, 100% UV protection is built standard into every Fuse lens—regardless of tint or color.

Visible Light Transmission (VLT) & Category Guide

Visible Light Transmission (VLT) refers to the exact percentage of ambient light that passes through a lens. VLT determines how dark a lens is, not how protective it is (since all Fuse lenses offer 100% UV protection regardless of darkness).

• Category 0 (80%–100% VLT | Clear / Night Use):

  • Allows virtually all ambient light through. Ideal for indoor digital work, nighttime driving, or safety protection.

  • Examples: Clear Lenses, Clear Blue Light Lenses, and Gaming Lenses.

• Category 1 (46%–79% VLT | Low Light / Overcast):

  • Lightly tinted lenses designed for dim, cloudy, or changing light conditions.

  • Examples: Photochromic lenses (in their unexposed indoor state) and very light gradient tints.

• Category 2 (18%–45% VLT | General Outdoor / Everyday Use):

  • Medium tint levels perfect for running errands, casual driving, and variable outdoor sunlight.

  • Examples: Fashion Gradient lenses, Yellow Polarized lenses (great for overcast or hazy contrast).

• Category 3 (10%–17% VLT | Bright Light / Intense Sun):

  • Darker tint range where the majority of Fuse sunglass lenses fall. Cuts through harsh sunlight while remaining fully safe and legal for driving.

  • Examples: Cosmic Mirror, Cascade Mirror, Nova Mirror, Grey/Brown base tints, and Fuse AMP lenses.

Frequently Asked Questions

• Are clear Fuse lenses also UV protected?

  • Yes! Even our completely clear lenses provide 100% UV400 protection against both UVA and UVB rays.

• Are your blue light lenses tinted yellow?

  • No. Our standard Blue Light Lenses are completely clear while filtering 35.6% of blue light rays. (We also offer a yellow-tinted Gaming Lens for users specifically seeking contrast enhancement for screen time).

• What does the VLT percentage on a lens listing mean?

  • VLT stands for Visible Light Transmission. It tells you how dark the lens is (lower percentage = darker lens)

For more information about blue light and blue light filtering lenses, visit our blog.