Those kinds of close up work should be avoided especially if the pay are not worth it. Our eyes are so precious and valuable that we can't just let menial stuffs to deny us the sense of sight or proper seeing.

I am always cautious of anything that comes close to my eyes. Even my phone's brightness is always dim cause I believe if it is too bright, it will affect me in one way or the other and it doesn’t affect now, it could be on the long run.