What factor primarily influences the accuracy of intraocular pressure measurements?

The primary factor that influences the accuracy of intraocular pressure measurements is corneal thickness. This is because the thickness of the cornea can affect how measurements are taken by tonometry, the most common method used to assess intraocular pressure. A thicker cornea may give a falsely elevated reading, while a thinner cornea may result in an inaccurately low reading.

Numerous studies have highlighted the correlation between corneal thickness and intraocular pressure measurements, emphasizing that adjustments may need to be made based on individual corneal characteristics. This understanding is critical for clinicians in order to accurately diagnose and manage conditions like glaucoma, where intraocular pressure is a crucial factor.

Other factors, such as patient age, eye color, and light sensitivity, do not have a direct and significant impact on the accuracy of these pressure measurements compared to corneal thickness. Therefore, understanding and considering corneal thickness is essential for obtaining accurate intraocular pressure readings.