What is the typical normal intraocular pressure range in millimeters of mercury (mmHg)?

What is the typical normal intraocular pressure range in millimeters of mercury (mmHg)?

• A. 5-15
• B. 10-21
• C. 15-25
• D. 25-35

Answer: (B)

Intraocular pressure reflects the balance between the production of aqueous humor and its drainage from the eye. In healthy adults, the typical normal range is about 10 to 21 mmHg, with minor daily fluctuations. Values within this window indicate a stable pressure that protects the optic nerve. Pressures consistently above this upper end can signal ocular hypertension or glaucoma risk, while pressures far below the lower end are uncommon in adults. Among the given options, 10–21 mmHg best matches the usual reference range.

Intraocular pressure reflects the balance between the production of aqueous humor and its drainage from the eye. In healthy adults, the typical normal range is about 10 to 21 mmHg, with minor daily fluctuations. Values within this window indicate a stable pressure that protects the optic nerve. Pressures consistently above this upper end can signal ocular hypertension or glaucoma risk, while pressures far below the lower end are uncommon in adults. Among the given options, 10–21 mmHg best matches the usual reference range.