An angle is a way of describing the space between 2 lines that begin at the same point. An angle is a measure of how much you have to turn one of the lines so that it perfectly overlaps with the other ...

Open-angle glaucoma is an eye disease that causes a gradual loss of vision. It is the most common type of glaucoma, a set of eye diseases that affect the eye's optic nerve. The optic nerve is located ...