In order to avoid privacy leakage, many citizens have affixed "anti peeping film" to their mobile phones. According to the merchant, the anti peeping film starts from 25 degrees from the side, which can effectively protect personal privacy. However, recently, some netizens said that since the anti peeping film was pasted on their mobile phones, their eyes were prone to fatigue symptoms. Some netizens said that their myopia deepened after using the anti peeping film. So, does the peep proof film really hurt your eyes? The anti peeping film is hot and "very tiring" to use. Recently, the topic of eye injury caused by the anti peeping film has been hot on Weibo. "After about two or three months of use, I felt that everything I saw was a little dark, and my cornea was often congested." Recently, some netizens revealed that they don't wear glasses and have good eyesight, but since the anti peeping film is affixed to their mobile phones, their eyes are prone to fatigue symptoms. This also resonated with many people. The reporter has noticed that there are many similar discussions on peep proof films on the Internet. "Since I used the anti peeping screen, my myopia has increased by 100 degrees in one semester." Netizen Xiaobei said that after using the anti peeping film for nearly half a year, he always felt that the screen was not bright and his eyes were very sour. "After changing the normal film, I felt that the mobile phone screen was super clear". Some people say that the brightness of the mobile phone becomes low after the film is applied, and it is necessary to adjust the brightness of the mobile phone very high to see the content on the screen, which indirectly increases the power consumption. From the perspective of peeping prevention effect, it can only prevent the side. In addition, it is easy to see that the touch screen is not sensitive enough in the process of use. "When you pay for something, the scanner is not easy to recognize". Miaomiao told the reporter that she bought two anti peeping films for 28.8 yuan with the recommendation of her classmates, and gave up using them more than two months later. She said that although the peep proof film protects privacy to a certain extent, it needs to adjust the angle many times to see the screen when it is used at ordinary times, which makes the eyes tired and makes them dizzy after a long time. The merchant said that the damage to the eyes was a misreading of the goods. The reporter noticed that there were not a few peep proof film products on the shopping platform. The search using "peep proof film" as the keyword showed a total of 250000 search results, with prices ranging from 9.9 yuan to 250 yuan. The merchants claimed that "eye protection, peeping prevention, ultra clarity, no eye injury, no eye glare" and "fingerprint seconds solution". From the perspective of sales, the highest monthly sales reached 100000 units. As for the principle of peeping prevention, the merchant introduced that there is a special spray layer on the mobile phone film, which is built into the toughened layer in the form of blades, similar to the shutter in life. Like the shutter opening and closing, the time line enters the room when the window is opened, and you can see the outside scene. When the window is closed, it blocks the outside light, and you can't see the outside scene. The merchant explained that the anti peeping film is the same. When viewed from the front, the window is open, and the screen content can be seen. When viewed from the side, the window is closed. Through the control of the blade on the angle of light, the light will only return in the original direction and will not be reflected from other angles. At the same time of front view, it blocks the peeking line of sight at a certain angle from the side, so as to protect privacy. Customer service also introduced that the anti peeping film starts from 25 degrees from the side, which can effectively protect personal privacy. Some businesses also admit that