My uncle had recently been diagnosed with Glaucoma and his doctor has suggested three kinds of drugs to treat his condition which are: Timoptic XE, Istalol, and Betoptic S. However, these drugs could be risky as he is obese, suffers from diabetes type II, and has a family history of cancer and heart disease. Please help! I'm no doctor here and I'm not sure which drug out of those three would be the best to use. Any help is appreciated, thanks.