Final answer:
Glaucoma is a common and serious ocular disorder characterized by increased ocular pressure and can cause blindness if left untreated.
Step-by-step explanation:
Glaucoma is one of the most common and serious ocular disorders characterized by increased ocular pressure, and if left untreated, it can lead to blindness. It occurs when the fluid in the eye does not drain properly, causing pressure to build up and damage the optic nerve. This condition is usually painless and progresses slowly, leading to vision loss gradually over time.