 Glaucoma is a heterogeneous group of disorders that progressively lead to blindness due to loss of retinal ganglion cells and damage to the optic nerve. It is a leading cause of blindness and visual impairment worldwide. A wide variety of animal models have been used to study the disease. These include monkeys, dogs, cats, rodents and several other species. This article was authored by Rashida A. Buheni, Jeffrey Dunmire, Abby Sewell and others.