Responds to Outdoor UV
Photochromic lenses become darker as outdoor UV exposure increases and return lighter as UV exposure decreases.
VLT
What is VLT?
Darker view · Lower VLTBrighter view · Higher VLT
VLT reference bands; each band is expanded for readability, not drawn to a linear scale.
VLT = Visible Light Transmission. It is the percentage of visible light that passes through the lens. A lower percentage gives a darker view; a higher percentage gives a brighter view.
VLT describes lens brightness. Check the lens specifications for this variant.
This lens provides UV400 protection. Lower VLT gives a darker view; it does not mean stronger UV protection. Photochromic lenses retain UV400 protection in both lighter and darker states.
Explore UV400 & VLT →Product Details
Fit type: Fit-Over
Style: Rectangle
Frame material: TR90
Lens: Polarized Photochromic
Model: TH-5776
Maximum compatible prescription frame: 133 × 40 mm
Product Measurements
- Lens width: 53 mm
- Lens height: 39 mm
- Bridge width: 18 mm
- Temple length: 137 mm
- Overall width: 144 mm
- Overall height: 44 mm
Measurements are taken manually and may vary by approximately 1–2 mm.
Not sure how to measure? Find Your Fit →
What's Included
Soft pouch, cleaning cloth, sports lanyard and polarization test card.
Polarized Photochromic Fit-Over Sunglasses – Rectangle TH-5776
Designed to wear comfortably over prescription or reading glasses.
Polarized · Photochromic · UV400 Protection
Photochromic darkening depends on UV exposure and may be limited behind UV-blocking windshields.Color
03 Light Brown
Regular price
$25.99
Shipping calculated at checkout.
LENS TECHNOLOGY
Photochromic Polarized
Adaptive tint, polarized glare reduction and UV400 protection in both lighter and darker states.
01
CORE FUNCTION
See what the lens is designed to do.
Polarized Glare Reduction
Polarization helps reduce reflected glare while the photochromic tint responds to changing outdoor UV.
A Brighter View in the Lighter State
The lighter starting tint allows more visible light through than a fixed dark daytime lens in non-intense light conditions.
02
MADE FOR
Where this lens fits into your day.
DAYTIME DRIVING
Polarized glare reduction with an adaptive outdoor tint.
CHANGING OUTDOOR LIGHT
Responds as outdoor UV conditions change through the day.
EVERYDAY OUTDOORS
Designed for movement between different outdoor environments.
LENS FAQ
Questions about this lens
Does this lens provide UV400 protection?
Yes. All TINHAO lens types provide UV400 protection against UVA and UVB wavelengths up to 400 nm, including yellow-tint lenses and photochromic lenses in both lighter and darker states. VLT describes visible-light transmission; it does not measure UV protection.
Are photochromic and polarized the same function?
No. Photochromic describes the tint response to UV exposure. Polarization helps reduce certain reflected glare.
Why does the lens darken less inside a vehicle?
Many vehicle windshields block a significant amount of UV light, which can limit photochromic activation.
Will the tint always reach the same darkness?
No. Tint depth and transition speed vary with UV intensity, temperature and environmental conditions.
