Please be carefull, as Inventor says each laser lases at a different wavelengths and requires different safety glasses. You MUST get the correct glasses for the correct wavelength.
Beleive me, I know... I've damaged my retina in my right eye with a Helium Neon laser. The damage is irrepairable.
I've also seen Health & Safety demonstrations of what lasers can do to animal eyes- they were dead already, but the damage is jaw droppingly horrendous.
Be careful!
I love deadlines- I like the whooshing sound they make as they fly by.