What is the term for the tonometry technique that displaces a minimal amount of fluid?

The term for the tonometry technique that displaces a minimal amount of fluid is applanation. This technique measures intraocular pressure by flattening a small area of the cornea. Unlike other tonometry methods that may involve greater fluid displacement or different techniques, applanation is specifically designed to minimize the fluid involved while obtaining an accurate measurement of eye pressure.

This method is widely used in clinical settings because it balances accuracy and safety, allowing for reliable assessments without significantly altering the eye's physiological state. It is important because accurate measurement of intraocular pressure is crucial for diagnosing and managing conditions such as glaucoma.