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Which Type of Sunglass Lenses Gives the Best Sun Protection?

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Determine which sunglass lens type and/or tints and coatings gives the best sun protection by absorbingultraviolet (UV) light.Use a UV-Detector to determine the intensity of ultraviolet light that is transmitted through sunglass lens as indicated by the detector. Figure outthe best sunglass lens type toreduce the chance of eye damage due to ultraviolet light overexposure.Earth's atmosphere prevents most ultraviolet (UV) radiation given off by the Sun from reaching the ground. The radiation tends to be screened out by stratospheric ozone, which is about 35 km above the Earth's surface. UV radiation has both positive and negative effects. Positive effects of UV radiation include warmth, light, photosynthesis in plants, and vitamin D synthesis in the human body. However, too much exposure to UV damages skin cellsand leads to wrinkled and patchy skin, cataracts, and even skin cancer.

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