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Ultraviolet and Near-Blue Light Effects on the Eye

Electromagnetic radiation from the sun continuously bombards the Earth’s atmosphere. Gamma and x-rays make up the higher frequencies of this spectrum and are absorbed by the atmosphere. Likewise, most wavelengths classified as ultraviolet radiation (UVR) are also absorbed, except where there are areas of atmospheric depletion known as ozone layer holes. The ozone layer absorbs wavelengths up to 286 nanometers (nm), thus shielding living beings from exposure to radiation with the highest energy. However, we are exposed to wavelengths above 286 nanometers, most of which falls within the visual spectrum. The shorter wavelengths pose the greatest hazard because they inversely contain more energy. Exposure to these wavelengths has been called the blue-light hazard because these wavelengths appear blue to the human eye.