Generally speaking, infrared scanning guns are not harmful to the eyes. The light of the infrared code scanning gun belongs to infrared light, and does not belong to the laser that can cause retinal burns, so it will not cause great harm to the eyes. Occasional exposure to infrared light will not cause eye discomfort. Prolonged and continuous exposure to infrared light may cause eye pain, tearing and other discomfort, which can mostly be relieved on its own. This is mainly due to eye irritation caused by the light, and does not cause irreversible damage such as burns to the eyes. Nonetheless, it is recommended that people avoid looking directly into the light of the infrared scanning gun as much as possible.