Recently, we have encountered several cases of children who have played with a laser pointer in the clinic, resulting in permanent vision damage. How is this caused? To understand this problem, first we need to recognize a structure of the eye – the macula. The most sensitive part of the human eye for seeing is the macula, and the most concentrated part of the light entering the eye is also the macula. The macula gathers a large number of visual cone cells and is the most sensitive area of the eye to perceive vision. Any lesion involving the macula will cause significant loss of central vision, darkening of vision and distortion. The cone cells have almost no regenerative ability, and once damaged, their function is difficult to recover. Laser pens can cause permanent damage to the macula due to the strong focus of the laser and the heat effect on the irradiated area. The degree of damage is directly related to the intensity of the laser and the time of exposure. A laser greater than 1 milliwatt directly irradiating the eye can cause damage to the macula. The laser pointer currently on the market is sold in large power, some even greater than 500 milliwatts, can instantly ignite matches, firecrackers and paper. Children and parents are easily tempted by advertising, driven by curiosity to buy high-powered toy laser pointer. Due to the lack of self-protection awareness, children use laser pointer to irradiate their own eyes or others, thus causing permanent damage to the macula. Children’s eyes are at a developmental stage and macular damage can affect vision and be difficult to recover from. In order to reduce or prevent the recurrence of laser pointer eye accidents, we recommend parents not to buy laser pointer or toys with laser light source for their children in general. School teachers should help students identify laser pens with hidden dangers. In the event of a laser pointer injury, go to the hospital immediately for treatment.