Glaucoma is a condition of the human eye where the optic nerve (the one that carries signals from the eye to the brain) gets damaged due to excessive pressure inside your eye. Glaucoma is one of the world’s leading causes of blindnessucoma is a condition of the human eye where the optic nerve (the one that carries signals from the eye to the brain) gets damaged due to excessive pressure inside your eye. Glaucoma is one of the world’s leading causes of blindness.