Visual Light Transmittance Sunglasses
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Lenses with 22 transmittance allow 22 of light rays to pass through them to your eye.
Visual light transmittance sunglasses. More names below are a form of protective eyewear designed primarily to prevent bright sunlight and high energy visible light from damaging or discomforting the eyes. Visible transmittance is a whole window rating and takes every component into consideration from the frame to the glass. Higher vlt percentage lenses will allow for more light to travel through the lens that will then hit the eye. In terms of numbers and range vt is measured on a scale of 0 1 with 0 being the lowest amount of light passing through and 1 being the highest amount.
Sunglasses or sun glasses informally called shades or sunnies. In other words this is how dark a pair of sunglasses will be. Vlt visual light transmission visual light transmission is the percentage of light allowed to pass through a lens. The transmission rate also called transmittance is a percentage given which describes the amount or rate of sunlight that will go through the lenses of your sunglasses and into your eyes.
Light transmission light transmission is the percentage of light that passes through the lens and reaches the eye. When deciding which kind of lenses to purchase a good place to start is with the visible light transmission vlt. This is termed the luminous transmittance. The higher the vlt percentage is the lighter the lens tint will be.
For example a lens with a visible light transmission of 20 allows 20 of the light to pass through the lens blocking the other 80. Most optical experts agree that the best light transmission range for sunglasses is from 10 to 30. The lower the vlt the darker the sun lens will be. This is measured as a percentage which indicates the darkness of a lens within a sunglasses frame.
They can sometimes also function as a visual aid as variously termed spectacles or glasses exist featuring lenses that are colored polarized or darkened. The amount of light that reaches your eyes through your lenses is called visible light transmission vlt. Lens category 0 zero 100 80 transmittance not sunglasses fashion spectacles very low reduction of sun glare and some uv protection. It can also be called visible light transmittance or vlt.
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