Primary Open-Angle Glaucoma
Primary open-angle glaucoma is the most common type of glaucoma.
The eye drains the aqueous fluid through its drainage system, but when this system becomes inefficient over time, it can no longer drain effectively. When the aqueous humour can’t drain properly, it builds up and exerts pressure on the optic nerve, causing damage.
Primary open-angle glaucoma typically develops gradually without symptoms. You will likely not notice any symptoms until you have significant vision loss.
Secondary glaucoma occurs due to an injury, infection, or tumour in or around the eye. It can also happen due to medical conditions, medications, or other abnormalities.