HERA

Sunglasses are a widely used protective product designed to block sunlight, reduce eye fatigue and prevent strong light stimulation from causing damage to the eyes.
Definition: Sunglasses, also known as sunglasses or sun visors, are glasses that can block sunlight and protect the eyes.
Function:
Block sunlight: Reduce the transmission of light through the lens to prevent the eyes from being directly exposed to strong sunlight.
Reduce eye fatigue: When doing outdoor activities, sunglasses can effectively reduce the fatigue of the eyes caused by adjusting the light.
Prevent strong light stimulation: Prevent ultraviolet rays (UV) and other harmful light from causing damage to the eyes, such as retinal burns.
Usage classification:
Sun visors: Mainly used for sunshade, suitable for wearing in a strong sunlight environment.
Light-colored sunglasses: The blocking effect on sunlight is weak, but the colors are rich, suitable for matching clothing, and have strong decorativeness.
Special-purpose sunglasses: Such as polarized sunglasses, color-changing sunglasses, etc., have special optical properties and are suitable for specific environments, such as beaches, skiing, mountain climbing, etc.
Lens classification:
Polarized lenses: can effectively reduce the transmission of reflected light and improve visual clarity.
Photochromic lenses: They automatically darken when exposed to sunlight and return to their original state when the light weakens. They are suitable for environments with large light changes.
Dyed lenses: The lenses are tinted by soaking in an organic pigment solution, with different colors and shades.