A common eye condition called glaucoma can harm the optic nerve. Loss of vision is the result of this damage to the optic nerve, which carries signals from the eyes to the brain. Visual loss could become permanent if it is not adequately addressed. The most frequent cause of glaucoma is a shift in intraocular pressure (IOP), which is the pressure of the eye's internal fluid. About 70 million people worldwide suffer from glaucoma. Over 80 million people will be affected by glaucoma disease globally in 2020, and over 111 million people are expected to be affected by the condition by 2040. 12.3% of all blindness in the world is due to glaucoma, which is the primary cause of irreversible blindness.