Well, folks, I had one of those moments that I like to claim a minor life victory. One of those times when things just seem to layer against you; just one thing after another. Claim those moments, own them and hold them as banners of triumph when you're feeling vanquished. Anyway, this one, simple it may be, involves my glasses. My dear, sweet son decided it would be gloriously amusing to color my left lens...with a Sharpie. After a bit of research, which turned up all kinds of horrifying suggestions (rubbing alcohol, hairspray, WD40...on my glasses???), I finally turned to my creativity. A dab of dishwashing liquid, rubbed gently upon the lens, the left to soak during the day. When I removed the glasses from the water...viola! No ink at all! So, I'm quite pleased with myself. So, no, no, NO to the other solutions; they will damage your lenses. Gentleness, along with the universal solvent and time, saved the day. Cheers!