“Secondary glaucoma is the name used to describe glaucomas that occur as a side effect or “secondary” to another underlying medical condition or trauma. This differs from primary glaucoma, where there’s no identifiable cause for the glaucoma to develop. Even though the cause of primary and secondary glaucomas may be different, the increase in eye pressure and the resulting damage to the optic nerve are the same.”

Glaucoma UK (https://glaucoma.uk/about-glaucoma/what-is-glaucoma/secondary-glaucomas/)