Glaucoma

Image of man’s eyes, one of which is affected by glaucoma
Glaucoma occurs due to damage to the optic nerve. Over time the disease develops into a loss of peripheral (side) vision.

Cataracts

Close-up of an eye with cataracts
Cataracts occur as your lenses naturally harden with age and may turn cloudy. The effect can be like looking through a dirty car windshield.