Plague Doctor Mask

your work is simply amazing. I've been working on my own plague doctor mask for over a year and a half now and I've finally gotten to the final stage of adding the lenses but I have no idea how to do it. I've been looking at your work trying to figure out how you attach the lenses and the only thing that seems like it would work as well as what I see in your masks would be to drill holes around the edges of the lenses and stitch them to the leather trim itself, but that seems like it would be really hard. any advice on how to attach the lenses would be extremely helpful