Sunglasses are to prevent human eyes from being irritated by strong sunlight. Why is it recommended that you go out with sunglasses in summer? Follow the glasses oem foundry to understand.
Our eyeballs (lens) are very easy to absorb ultraviolet rays. The damage of ultraviolet rays to the eyes is invisible. To protect the eyes, we must wear sunglasses.
1. UV damage will accumulate. Because ultraviolet light is invisible light, it is difficult for people to feel it intuitively.
2. The damage of ultraviolet rays to the eyes is irreversible, that is, irreparable. For example, cataract surgery can only be replaced by intraocular lenses. Long-term damage to the eye can easily lead to damage to the cornea and retina, opacity of the lens and cataracts, resulting in visual damage.
Because the damage of ultraviolet rays to the eyes is invisible, it is not immediately felt. If you don’t usually wear glasses, you don’t feel particularly uncomfortable. It just means that your eyes are not very sensitive to visible light (such as glare, glare, and reflected light). , And can not avoid the damage of ultraviolet rays.
Is the darker the sun lens, the better the UV blocking effect?
No! The function of the lens to block ultraviolet rays is due to its special processing (adding UV powder) during the manufacturing process, so that the lens can absorb harmful light such as ultraviolet rays below 400NM when the light penetrates, and it has nothing to do with the shade of the film.