This is a simple procedure to determine your binocular vision.
The optician will use an occluder to alternately cover your eyes in turn as you look at a stationary target.
This test can tell the optician if you have a squint.
We recommend you seek professional advice if you are concerned about your eye
If you need more help, you can contact us by searching for your nearest store below. Just type in your postcode, city or town.