Okay, I can't see the scribe mark to saw the dovetails now. I realize this question may not belong here, but bear with me. I had to use the 1.50 diopter reading glasses from the drugstore to saw pins today. There are contacts now that claim to be multi-focal for people my age. Does anyone use contacts in a woodshop? Does the wood dust make this not workable? I would just like to be able to see the line again. The drugstore glasses are very annoying. Just thought others might be able to help me. Maybe this all one can do. I would try to learn to wear contacts if it might work, that is if someone who actually uses a saw chisel could attest.