Types of Glaucoma
There are two major forms of glaucoma: open angle glaucoma and angle-closure glaucoma. About 90% of cases of glaucoma are primary open angle glaucoma (POAG). The majority of others are angle-closure glaucoma.
Less common forms of glaucoma include congenital glaucoma, which tends to run in families and is present at birth; normal tension glaucoma; pigmentary glaucoma; pseudoexfoliative glaucoma; traumatic glaucoma; neovascular glaucoma; and iridocorneal endothelial syndrome.
In the last several years, glaucoma has come to be described as a “neurodegenerative disease,” because it shares features with several brain disorders including Alzheimer's disease, amyotrophic lateral sclerosis (Lou Gehrig's disease), and Parkinson's disease.4