I believe the NYEE program headed by Bob Ritch is pretty good - I hear they work your tail off though. Bob Ritch, I hear, has the typical New Yorker personality, so make sure you can handle that.
Jeff Liebmann is supposed to be pretty nice though. If you really want to stay in NY for a glaucoma fellowship, this is the one to go.
If you are more open to the "east coast," you have more options.
Wills Eye Hospital in Phily is an excellent program.
Mass Eye & Ear is also a well-respected fellowship program.
You should definitely speak with the glaucoma faculty at your program to get their opinion.