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A Category 2 sun tint is a standardized classification for sunglass lenses based on Visible Light Transmission (VLT). Lenses in this category transmit between 18 percent and 43 percent of visible light. This makes them moderately dark, suitable for general outdoor use in changeable or moderate sunlight.
read more about category 2 eyeglass sun tint ...Category 2 is suitable for everyday wear because it offers good light reduction without being too dark for partially shaded areas. It provides a comfortable level of glare reduction for overcast days or driving in variable light conditions.
Category 3 tints are darker, transmitting only 8 percent to 18 percent of light, making them best for bright sun and beaches. Category 2 is lighter, allowing more light through, which is better for transitional conditions like walking in and out of shadows.
Category 2 tints are excellent for driving. They reduce brightness without impairing vision in the car's interior or in tunnels. Their moderate darkness makes them a versatile choice for people who drive in conditions ranging from cloudy to moderate sun.
Since contacts provide clear vision, a Category 2 tint is a good option to wear over them. It adds moderate sun protection and comfort for daily outdoor tasks without being excessively dark.
No, any tinted lens is unsuitable for safe night driving.
No, high-altitude sports require Category 4, which blocks more light.
Yes, the Category 2 rating refers only to the tint density. The lens can be polarized or non-polarized.
Category 2 lenses transmit 18% to 43% of light. If you find these too light for daytime use, your pupils may be larger than average, letting in too much light. A doctor can check your "pupil size" in different light levels to recommend the safest tint category.
ISO 12312-1:2022. Eye and Face Protection - Sunglasses (iso.org). 2024.
AAO. Choosing the Best Sunglasses (aao.org). 2024.
Review of Optometry. Pupil Diameter and Light Transmission (reviewofoptometry.com). 2023.
National Safety Council. Sunglasses and Safe Driving (nsc.org). 2024.