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Are there different types of glaucoma?

The 2 main types of glaucoma are open-angle glaucoma and angle-closure glaucoma. In angle-closure glaucoma, the normal drainage canals within the eye are physically blocked. Angle-closure glaucoma can be acute (sudden) or chronic (long-lasting). In open-angle glaucoma, the drainage system remains open. Both angle-closure glaucoma and open-angle glaucoma may cause vision damage with or without symptoms. Some types of glaucoma include, among others, congenital glaucoma, childhood glaucoma, normal (or low) tension glaucoma, and secondary glaucoma.