tints

Tints not only vary in color, but also vary in transmissibility. The amount of light that is transmitted is the amount of light allowed to pass through the lens. The darkness of the tint does not indicate it’s capability to protect against harmful UV light.

While you may think that sunglasses are just glasses with a tint, but protecting the eyes requires more than just a tint.  The tint decreases the amount of light that reaches your eyes.  Generally, the darker the tint, the less light is transmitted (passed through) the lens. Someone who is outdoors and needs to decrease the brightness of sunlight, will choose a lens with low transmittance.  Keep in mind, the darkness of the tint does not indicate it’s capability to protect against harmful UV light. (more…)