Final answer:
An intraocular pressure of 20 mm Hg falls within the normal range of 12 to 24 mm Hg and is considered normal, not indicative of glaucoma.
Step-by-step explanation:
The tonometry test result indicating an intraocular pressure of 20 mm Hg is interpreted as normal intraocular pressure. Normal intraocular pressure typically ranges from 12 to 24 mm Hg. It is crucial to monitor intraocular pressure because elevated levels can lead to a condition known as glaucoma, which can cause permanent damage to the optic nerve. In cases where intraocular pressure reaches excessively high levels, such as 85.0 mm Hg, it can exert enough force to damage the eye’s structures. Thus, maintaining intraocular pressure within the normal range is important for eye health.