In optical terminology, what does "UV protection" refer to?

"UV protection" specifically refers to the lens's ability to block harmful ultraviolet rays. Ultraviolet (UV) rays are a type of radiation emitted by the sun, which can cause a range of eye problems, including cataracts, macular degeneration, and other forms of eye damage. Lenses with UV protection are designed to filter out these rays, thus safeguarding the eyes from potential harm. This feature is crucial for maintaining long-term eye health, especially for individuals who spend a significant amount of time outdoors.

In contrast, enhancing contrast, adjusting to light, and improving vision under low light all pertain to different optical properties and functionalities of eyeglasses but do not directly relate to the concept of blocking ultraviolet rays.