What is glaucoma?What are the main signs and symptoms of glaucoma?How is glaucoma diagnosed?What are some of the main medical treatments for glaucoma?Have any supplements been studied for glaucoma?How could diet affect glaucoma?Are there any other treatments for glaucoma?What causes glaucoma?What are the different types of glaucoma?What are the risk factors for glaucoma?What causes an increase in intraocular pressure?Can I have elevated intraocular pressure without glaucoma or glaucoma without elevated intraocular pressure?Can vision that is lost due to glaucoma be restored?