What are your thoughts on loupes for role play?

What are your thoughts on loupes for role play or any other purpose you would like to use them for? The obvious uses would be for dental or medical/surgical role play, but there are some practical uses as well. I could definitely see using them in fetish settings as the patient or dentist. Also, I am sure I can find other non fetish reasons to use them. Anyone else have a pair, use them in fetish settings and/or practical uses? Ideas, experiences, etc.