Q. Sometimes my glasses get stuck to a hair. Am I allowed to remove the glasses on Shabbos, even though I am pulling out a hair along with it?
A. Horav Shlomo Miller’s Shlit’a opinion is that if it is not a necessary and unavoidable “p’sik reisha” that a hair will be pulled out, it may be permitted since you have no intention of tearing any hair (eino miskaven).
The Rov recommended, to have someone else remove the glasses for you when stuck in your hair, as he may be able to see and assess better the situation and probabilities, and thus carefully avoid tearing any hairs when removing the glasses.
Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a