Normal eyes have pressure.
Glaucoma is the abnormal elevation of eye pressure with resultant ocular and optic nerve injury causing loss of vision. Childhood glaucoma develops in 1 out of 10,000 children. There is a normal physiologic flow of fluid out of the eye. Glaucoma occurs when this drainage is impeded by abnormal development or injury to the porous drainage tissues. Childhood glaucoma may be of primary genetic origin or occur secondary to other pediatric eye diseases.