tonometry

Thân thiện

An optometrist performs tonometry on a patient during an eye exam.

Definition

Noun: - The measurement of intraocular pressure: Tonometry is a medical procedure used to determine the pressure inside the eye (intraocular pressure or IOP). This is a key test in screening for and managing glaucoma.

Usage

Tonometry is a standard part of a comprehensive eye examination, especially for individuals at risk for glaucoma. The procedure involves applying a small amount of force to the cornea to measure its resistance, which correlates with the internal eye pressure.

Examples

• The optometrist performed tonometry as part of my annual eye check-up.
• Accurate tonometry is essential for the early detection of glaucoma.
• Several methods of tonometry exist, including the "air puff" test and applanation tonometry.

Advanced Usage

• Applanation tonometry: A specific, highly accurate method of tonometry that involves flattening a small area of the cornea to measure pressure.
• Non-contact tonometry (NCT): Often called the "air puff test," this method uses a brief puff of air to measure IOP without touching the eye.

Variants and Related Words

• Tonometer (n): The instrument used to perform tonometry.
• Intraocular Pressure (IOP) (n): The fluid pressure inside the eye, which tonometry measures.

Synonyms

• Intraocular pressure measurement
• IOP testing

Notes

Tonometry itself is not a treatment or a diagnosis of a specific disease but a diagnostic measurement. High intraocular pressure readings from tonometry are a major risk factor for glaucoma, a condition that can lead to optic nerve damage and vision loss.

Học thuật

Noun

1. the measurement of intraocular pressure by determining the amount of force needed to make a slight indentation in the cornea