Crystal pumping and scientific research, long distance NV photo illumination is a major use, like an invisible spotlight for your camera, that among many other uses, but you must understand the divergence of the unit and the safe operating parameters before operating.
Military squad commanders can paint targets for NV equipped troops.
If you don't have a legitimate use you should not use invisible wavelengths that can reach the retina. They are dangerous and require extra precaution.
Accidents can happen easily, do yourself a favor and go with a visible wavelength.
Also be aware there is eye safe and non eye safe, some in the 1550nm range will not penetrate your eyes lens and are safer, but read for yourself and know what you are doing, any invisible laser has a higher chance for accidents.
As always Safety First.
