Yes, it is true. It is very possible that dehydration is able to cause high eye pressure. To prevent high eye pressure, you should firstly increase your fluid intake in a healthy way, such as drinking 8 to 10 glasses of healthy liquids frequently throughout the day to stay sufficiently hydrated. However, you should pay attention that Consuming large quantities of liquids in a short time will also increase eye pressure. In addition, avoid sugary, caffeinated, carbonated and alcoholic beverages so that you can avoid dehydration. Create a balanced diet according to your personal need and rich in fresh vegetables and fruit and then stick to it. Supplements such as vitamins C and E, Omega-3 fatty acids and beta carotene will as well help to protect your optic nerve from damage. It is not conductive to the health of eyes to spend hours continuously staring at the computer screen or television set or even reading books. Therefore, you should pay attention to limit your time of using the eyes to give your eyes adequate and regular rest. It is also desirable to do some eye exercises periodically such as closing your eyes and rotate them in circles to restore energy and improve the circulation of blood to the eyes, which to some extent will help drain excess fluids, toxins and congestion. Under great stress may also lead to high eye pressure. So you should keep in a good and relaxed mood, doing some stress-reducing activities such as tai chi, yoga, visualization techniques and meditation that may have a positive impact on eye pressure.