Help and frequently asked questions

Why does the optician blow air into my eyes during the eye examination?


This is part of a test which measures your intraocular pressure (IOP) using a tonometer - a raised IOP can indicate a problem with the eye such as glaucoma.

The puff of air flattens your cornea and the instrument senses the deflection and calculates your IOP.

Was this answer helpful?

More help in store

If you need more help, you can contact us by searching for your nearest store below. Just type in your postcode, city or town.