Classification of glaucoma are as following:  Cong glaucoma Infantile glaucoma Juvenile glaucoma Primary glaucoma open angle closed angle Secondary glaucoma Ocular hypertension Low tension glaucoma Normal tension glaucoma Pigmentary glaucoma Neovascular glaucoma P E glaucoma Contusion glaucoma Steroid induced glaucoma Absolute glaucoma Aphakic glaucoma