Do not use laser pointers around collecting optics (microscopes, lenses, binoculars, etc.) Lasers with power, greater than 5 milliwatts (mW) (Class 3B and Class 4), must be registered with radiation ...

Class 2 lasers producing a non-visible wavelength can cause permanent damage because the blink reflex of the eye does not offer any protection here. As even some dodgy laser pointers are being ...