Well, yes, they are different from each other. First, cataracts occur when there is a build up of protein in the lens that makes it cloudy. When you suffer it, it will just prevent light from passing clearly through the lens, and in the end, it can just lead to blindness. So this kind of disease can be dangerous. For the causes, it can be caused by irritants. On the other hand, glaucoma actually is related to a group of diseases and it can cause damage to the optic nerve as a result of increased pressure within the eye. And for the causes, it can be caused by a severe eye infection, injury, blocked blood vessels or inflammatory conditions of the eye. Also, it can be hereditary. But you should know that for the treatments, you can just try some lutein to heal both of them. Also, you should pay attention to cigarette smoke, air pollution, and heavy alcohol consumption which can be harmful to the two diseases.