A brief review of the simple way of glaucoma classification:   Congenital glaucoma during intrauterine life Infantile glaucoma that is from birth to 3 years Juvenile glaucoma from 3 to 17 years Primary glaucoma here we have Open-angle glaucoma or chronic simple Closed glaucoma  Secondary glaucoma Ocular hypertension Low tension glaucoma Normal tension glaucoma Pigmentary glaucoma Neovascular glaucoma Steroid-induced glaucoma Pseudoexfoliation glaucoma Contusion or angle recession glaucoma Absolute glaucoma Aphakic glaucoma