Help and frequently asked questions

What does O.S. mean on my prescription?


O.S is a shortened form of the Latin term “oculus sinister” and refers to the left eye.

Was this answer helpful?

We recommend you seek professional advice if you are concerned about your eye health

Book an eye test

Search for more answers:

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.