Subjects who wear eye glasses can offer a unique difficulty for photographers. First, there’s the dilemma of whether they should wear them or not will they not feel & look like themselves without them? Are they hiding fabulous eyes behind those glasses? And then there’s the problem of glare and reflection. An attentive photographer will pay attention to this factor, but it does cause issues and where a photo might be perfectly composed and lit, but a little glare in the glasses can throw the whole thing off.

via How to Prevent & Edit out Reflections on Glasses.