If the NCT reading is above what value, does it indicate high pressure?

In the context of intraocular pressure (IOP) measurements, particularly from a Non-Contact Tonometer (NCT), a reading above 30 mmHg is often considered indicative of high ocular pressure. This threshold is significant because elevated intraocular pressure is a major risk factor for glaucoma, a condition that can lead to vision loss.

A reading above 30 mmHg suggests that the pressure in the eye is likely higher than normal, which typically ranges from 10 to 21 mmHg. Readings consistently above 30 are concerning and warrant further investigation or potential intervention by an eye care professional. Therefore, the correct choice highlights a critical benchmark in assessing potential ocular health issues.