Final answer:
Normal intraocular pressure ranges from 12.0 to 24.0 mm Hg, and it is important for maintaining eye health. A tonometer is used to measure IOP, which can prevent glaucoma — a condition of increased pressure in the eye. Regular monitoring is especially important for those over 40 years of age.
Step-by-step explanation:
Normal intraocular pressure (IOP) is critical for maintaining the shape and health of the eye. The usual range of IOP is between 12.0 to 24.0 mm Hg. Situations where eye fluid circulation is compromised can lead to glaucoma, caused by a significant increase in IOP. Tested with devices like a tonometer, detection and management of high IOP can help prevent damage to the optic nerve. In individuals over 40, glaucoma risk increases, making routine IOP checks recommended for early detection and control of potentially excessive pressures.