Which class of laser system is considered safe if handled carefully with restricted viewing?

Class 1 laser systems are considered safe when handled carefully, as they pose no risk of injury under normal operating conditions and do not emit hazardous levels of radiation. However, restricted viewing, such as avoiding direct eye exposure, is recommended to ensure safety. These lasers are commonly found in devices like barcode scanners and CD players. Proper precautions should always be taken to maintain safety.