What is the normal range for intraocular pressure (IOP)?

• A. 5 to 10 mmHg
• B. 10 to 21 mmHg
• C. 22 to 30 mmHg
• D. 31 to 40 mmHg

Answer: (B)

The normal range for intraocular pressure (IOP) is between 10 to 21 mmHg. This range is established based on clinical studies and observation of healthy individuals without any ocular diseases, particularly glaucoma. Maintaining IOP within this range is crucial for the overall health of the eye, as elevated pressures can lead to optic nerve damage and other complications associated with glaucoma.

IOP is a critical factor in assessing eye health, and measurements outside this range can indicate potential issues. Values lower than 10 mmHg may suggest conditions like ocular hypotony, while values above 21 mmHg are often considered elevated and could warrant further examination for potential glaucoma risk. Understanding these norms ensures that practitioners can accurately interpret IOP readings and make informed decisions regarding patient care.