The human eyes are highly sensitive to the radiation emoted by laser beams and when they are not adequately protected, may sustain damages ranging from minor to severe injuries which can impair vision temporarily or permanently.
Threshold and extent of the eye or ocular damage depend on the wavelength, beam divergence and duration of exposure to the laser beam.
Thus, one must properly observe precautionary measures to prevent or minimize the occurrence of eye injuries in handling laser levels.
Laser Level Ocular Hazards
Laser beam is a highly collimated light making it a form of intense light with strong power, enough to cause intense retinal responses to a magnitude even greater than viewing the sun directly with bare eyes.
This then poses a great threat to the integrity of the eye structures which can lead to permanent blindness.