What is glaucoma?

Glaucoma is the collective name for a group of eye diseases that result in damage to the optic nerve resulting in vision loss.

An estimated 60 million people worldwide are affected by open-angle glaucoma (global prevalence of 2.2%), with approximately 480,000 people affected in England alone.

Detection of glaucoma can be difficult and will require tonometry (measurement of eye pressure), nerve fibre and ganglion cell analyses (OCT), and perimetry (visual fields measuring). Treatment is usually using eyedrops to lower the pressure and the condition may need monitoring over many months or years.

There are several different types of glaucoma which are shown below: