I never have done no. I am very careful around the laser, I always make sure I know where it is going, and I always make sure I have my laser goggles on. Most of the time the laser is covered so it is quite difficult to hurt yourself with it.
Someone where I work about 5 years ago though had the laser go in one of his eyes, and he was blinded. so they can be dangerous if you are not careful.
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