For those that work around lasers, laser eye protection is a number one priority. When your eyes are unprotected either direct or indirect reflected, laser beams can permanently damage them. The reason for this has to do with the sensitivity of the human eye to laser radiation.
The amount of damage to the eye depends on the wavelength put out by the laser. Laser light that is within the spectrum of 400-1400 nm are known as within the retinal hazard region and have the capability to cause damage to the retina. Any wavelengths outside of this are known as absorbed by the outer portion of the eye, so that it causes damage to the cornea and lens.