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″[Sleeping with contact lenses in your eyes] is bad. It’s real bad. Don’t do it,” Redfern told us, adding that this even applies to naps. “It’s like a game of Russian roulette.”
Learn how blue light, a type of short-wave light in the violet / blue band, can affect circadian rhythm, retinal health, and sleep quality. Find out the sources, evidence, and controversies of blue light exposure and filtering.
Infrared vision is the capability of detecting infrared radiation, which is related to the temperature of objects. The term thermal vision is also used, but it is not the same as night vision. Learn about the history, spectrum, and uses of infrared vision in military, civil, and biological fields.
Learn about visual perception, the ability to interpret the environment through different types of vision, such as photopic vision (daytime vision) and scotopic vision (night vision). Explore the history, physiology, and psychology of vision science, from ancient theories to modern research.
An eye surgeon will conduct a series of tests before surgery to ensure your eyes are healthy before laser eye surgery. After the procedure, you can expect to have some limitations to avoid damage ...
The pupil of the eye dilates in the dark to enhance night vision. Shown here is a pupil of an adult naturally dilated to 9 mm in diameter in mesopic light levels. The average human eye is not able to dilate to this extent without the use of mydriatics. Nocturnal mammals have rods with unique properties that make enhanced night vision possible.
There are chemicals in cookware, food, water, clothes and furniture that could cause problems for people’s health. These PFAS, or perfluoroalkyl and polyfluoroalkyl substances — sometimes ...
The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye, from about 380 to 750 nanometers. Learn how Newton discovered and named the spectral colors, and how they relate to music and nature.