This disease is known as the 'silent thief of sight'

In glaucoma, damage to the optic nerve is caused by too much pressure within the eye. — Photos: 123rf.com

Glaucoma affects about 80 million people worldwide and is the second leading cause of blindness globally, after cataracts.

However, it creates a greater public health challenge than cataracts, as the blindness caused by glaucoma is irreversible.