I have also just started wearing glasses a few weeks ago, at the age of 39 I was prescribed glasses for my long distance vision and a stigmatism. The free trial pair of contacts dont work my dominent right eye is still blurry with the contact, going back this week to the docs about the contacts.
I found that if I try to aim while looking through the peep with both eyes open I also get double vision, so I have had to change to shooting with one eye closed.
I found that when I try to shoot I cant see clearly through my peep because the bridge of the glasses blocks my view through the peep, so after shooting with and watching 2 other people whom wear glasses while shooting I tried thier advice( to turn my head slightly so I am facing the target more ) when I did this it caused me to not to be able to anchor where I usually do and this was really screwing up my form, after years of teaching my self to always anchor at the same spot even with my eyes closed, its very hard to try and anchor elsewhere.
I shot my first indoor league last nite while wearing glasses and my score dropped 15 points from my average

I am also having the problem of focusing on the target, if I do then my pins are a blur. I finally gave up part way through the shot with the glasses , I was getting a terrible headache, and continued to shoot the rest of it without wearing the glasses.[:@][X(]