When we are born ...

... our brain begins to receive images from our eyes.

Initially, the child's vision is not very clear ...

... but over the first few months and years of life, this gradually improves.

If a small child has a squint ...

... the affected eye will distort the vision.

The brain will start to disregard the messages from the affected eye.

By forcing the affected eye to work harder ...

... the images are received by the brain ...

... and the condition corrected.