Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.
A nanometer is a unit of length equal to one-billionth of a meter. It's used to measure the wavelength of light and microscopic features in materials. In vision science, nanometers describe the range of visible light that the human eye can detect.
read more about nanometer (nm) ...Visible light spans wavelengths from roughly 380 to 750 nanometers. These wavelengths determine light color and energy. Shorter wavelengths carry more energy and appear blue or violet, while longer ones appear red and less energetic.
Nanometer-scale measurements guide how lenses and coatings manage light.
Nanometer precision is used in designing lens coatings, filters, and materials. It defines how light interacts with a lens surface, influencing glare reduction, tinting, and protection. Advanced optical tools measure coatings and layer thickness in nanometers for accuracy.
Spectrophotometers and interferometers measure light wavelengths and coating thickness at the nanometer scale. This data helps manufacturers create lenses with reliable visual performance and UV filtering.
Between about 380 and 750 nanometers.
Different wavelengths produce specific colors, shorter for blue, longer for red.
They determine how coatings control light reflection and filtering.
Specific coatings are designed to filter nanometers of blue light (400-450nm) to improve sleep and reduce strain. If you have trouble sleeping after screen use, ask your doctor for a demonstration of lenses that filter these specific high-energy wavelengths.
Harvard Health. Blue light has a dark side (health.harvard.edu). 2023.
AAO. The Visible Light Spectrum (aao.org). 2024.
Sleep Foundation. Light and Sleep (sleepfoundation.org). 2024.
Review of Optometry. The Effects of Blue Light (reviewofoptometry.com). 2024.