Non-contact tonometry is a way of measuring eye pressure using a gentle puff of air.
What to expect during non-contact tonometry
You rest your chin on a support and look at a small light. A short puff of air briefly flattens the cornea, and the machine calculates the pressure inside your eye.
- The test is quick and does not touch the eye
- You might feel a mild surprise from the puff but no real pain
- No drops are usually needed and vision remains clear
- Results help screen for conditions like glaucoma
Why eye pressure measurement matters
Eye pressure is one factor influencing the health of the optic nerve. Regular checks can detect problems early, often before you notice changes in vision.
- Raised pressure may prompt further tests or treatment
- People with a family history of glaucoma benefit from regular screening
- Readings can vary, so repeat measurements are sometimes required
- The test is safe for most patients, including children
