What is the difference between glaucoma and cataracts?

Though both affect the eye, they do so in quite different ways. Glaucoma is a disease that damages the optic nerve permenantly and progresivly when left untreated, caused by increased pressure in the eye. Cataracts make the eye become cloudy and interfere with the light entering the eye, causing the sufferer to lose their central or peripheral vision as well as causing blurry, tinted or double vision, depending on where the cloudiness occurs in the lens.