Blue film for mobile phone eye protection, is it useful?

Blue light film for mobile phone eye protection is useless.

1, the harm of mobile phone to eyes is mainly that staring at a small and bright screen for a long time will cause eye fatigue, and staring for a long time will cause eye damage, which has little to do with blue light. After all, the blue light on the mobile phone screen is not stronger than the ultraviolet light of the sun. In fact, the blue light on the mobile phone screen has almost negligible influence on the eyes, and there is no difference whether the blue light film is attached or not.

2. Under normal circumstances, the illumination of the mobile phone screen itself is already very low. Sticking protective film will increase the fatigue of eyes, and it will easily damage vision after a long time.

3. Because the protective film can easily refract the light on the screen of the mobile phone, staring for a long time will cause visual fatigue. Especially outdoors, coupled with insufficient screen lighting, it is even more difficult to see the fonts clearly, so that the ciliary muscles are often in a state of tension, the convexity of the lens is always large, and the eyes are prone to fatigue due to excessive adjustment. Over time, the convex lens can't return to its normal state, which will form or aggravate myopia. Some people stare at the mobile phone screen and send text messages when they are on the bus or walking, which is even worse. With the vibration of the carriage, the car body is also shaking, and the distance between the eyes and the screen of the mobile phone can not be fixed, and the low illumination increases the burden on the eyes.

4. Therefore, the blue film of mobile phone eye protection not only does not protect the eyes, but will increase and deepen the damage to the eyes.