Is the flash really harmful to people's eyes?

For adults, the flashing time is only a moment. As long as we don't stare at the flashing lights for a long time, it basically has no effect on us. People's pupils will increase or decrease due to the light intensity of the external environment, so as to control too much light to enter the fundus and cause damage. But the speed of flash is too fast, and the pupil can't contract at all, so flash will cause temporary damage to the visual cells and nerves in our fundus. However, generally speaking, this kind of "damage" can be recovered within a few minutes without causing very serious consequences.

Unless the intensity and repetition frequency of flash are very high, the damage will naturally increase, and in severe cases, irreversible damage will be caused. If you are often stimulated by the flash, the nerve function of each part of the eye will be gradually damaged and the function will decline, thus affecting people's normal vision. At the same time, it can also lead to eye diseases.

However, some people on the Internet will doubt whether the flash has any effect on adults' eyes and children's eyes. I can tell you here that the type of light emitted by the camera flash is similar to that of outdoor light, and the scattering is not focused and the time is short. It is impossible to hurt a child's eyes. In fact, ophthalmologists often examine babies' eyes with strong flashlights.

When the eyes observe things, the object enters the eyes and is "captured" in the macular area for the first time, and the focusing is also completed by the macular area. Macula is located in the center of retina, which is the visual center of human beings and the most sensitive and fragile area of light. Newborns complete their development after 4-6 months. Generally speaking, before 100 days, the baby's macula is not fully developed, the pupil is very small, and no light source can be seen. Light has no effect on them. Most of the flashlights in the studio of photography service agencies have soft light equipment. Light scattering, brightness equivalent to outdoor natural light, will not affect children's eyes.