MRI stands for magnetic resonance imaging. Instead of X-ray radiation, It uses magnets and radio waves to produce images of inside the body. It gives very fine detailed pictures of the eye, the optic nerve, and the brain. When you arrive at the department you will have a short safety questionnaire to complete; if you have any metal inside the body or are claustrophobic you may not be able to get the MRI scan. Sometimes contrast dye is injected into the vein during the scan to help get more detailed images. The MRI scanner is a large circular tube, which you lay down flat in. The radiographer then leaves the room to operate the scanner from the next room. You will be able to communicate with them however through an intercom system. During the scan you will be asked to lie still and to breathe normally. You may hear loud tapping noises during the scan- this is normal. You will be given earplugs or headphones to wear so you can listen to music. The scan takes 30 minutes to an 1 hour to complete. After the scan, the images are analysed and the results will be given to you at your next clinic appointment.