bdk Loc: Sanibel Fl.

Im not good at portrait photography, but Im learning.
I set my wife on a stool with her glasses, put the camera on a tripod and started taking pics and making adjustments of the lights. I found putting the light higher , and tilting her head down a bit and I got rid of the reflection.
someone mentioned tilting the glasses, which would probably take the place of tilting the head.

In the pic you took, to me it looks like the light needed to go up a bit more.

ALSO I would have put some type of fill light on the side. The shadows on his jacket make it look more like stained then a shadow. IMHO.

henrycrafter Loc: Orem Utah

My best success in dealing with this issue has been to use a polarizer

10MPlayer Loc: California

I remember doing this for my wedding pictures many many years ago. I thought it was strange at the time but our wedding photographer was an old pro and knew his stuff. It works.

Nikon_Bill Loc: South Florida

Some serious advertising photographers use models with no lenses in the glasses. Just the frames. Remove the lenses! It works at any angle, but that is a reverse approach to a problem that does work for commercial work. It isn't very practical for an occasional portrait.