Final answer:
Glaucoma is a condition characterized by increased pressure within the eyeball. Intraocular pressure is measured to detect and monitor glaucoma. People over 40 should have their intraocular pressure tested regularly.
Step-by-step explanation:
Glaucoma is a condition characterized by an increase in the pressure within the eyeball. This increased pressure can damage the optic nerve. Intraocular pressure is measured to detect and monitor glaucoma. If the pressure is high, the eye will deform less and rebound more vigorously than normal. People over 40 years of age are at greater risk of developing glaucoma and should have their intraocular pressure tested regularly.