Nystagmus is a condition which causes constant movement of the eyes which you can’t control.

This can be in a side to side, an up and down, or a circular motion, or a combination of these. This uncontrolled movement can affect how clearly you can see. Most people with nystagmus have reduced vision. 

Nystagmus is caused by a problem with the way the eye sends messages back to the brain or how parts of the brain which deal with eye movement make sense of the information.

This page contains a summary of our information on nystagmus. To read our full information, download our Understanding Nystagmus guide, which is accredited by the Royal College of Ophthalmologists:

Download Understanding Nystagmus in PDF

You can also download Understanding Nystagmus in Word.