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Infrared (IR) is electromagnetic radiation with wavelengths longer than visible light, extending from about 700 nanometers to one millimeter. While invisible to the human eye, it is felt as heat. Infrared radiation is naturally emitted by the sun and common sources like heaters, lamps, and hot surfaces.
read more about infrared light ...Infrared radiation is grouped based on its wavelength, which determines how deeply it penetrates the eye tissues.
Exposure to intense infrared radiation can damage the eye. IR-A, the deepest penetrating type, can cause heat damage to the retina. High levels of IR-B and IR-C are absorbed by the lens, potentially accelerating the development of cataracts (clouding of the lens).
In daily life, the sun is the main source of infrared radiation. Industrial settings, such as glass blowing, welding, and foundries, pose a higher risk due to intense heat sources. Wearing protective eyewear in these environments is needed to prevent thermal injury.
Lenses that absorb or reflect infrared radiation are used for protection. For welding, specialized dark lenses block IR along with intense visible and UV light. Sunglasses with high-quality coatings help reduce infrared exposure outdoors.
No, infrared light is outside the visible spectrum and is perceived only as heat.
No, UV protection blocks ultraviolet rays (shorter than visible light). Separate coatings are needed to block infrared.
Yes, electronic devices emit low levels of infrared, but the intensity is usually not damaging.
If you work in an industrial setting with molten glass or metal, you are at risk for "glassblower's cataracts" caused by infrared exposure. Ensure you wear IR-specific safety goggles and have annual eye exams to check lens clarity.
OSHA. Eye and Face Protection (osha.gov). 2024.
AAO. The Electromagnetic Spectrum and the Eye (aao.org). 2023.
WHO. Radiation: Infrared (who.int). 2024.
National Institute of Environmental Health Sciences. UV and IR Radiation (niehs.nih.gov). 2024.