The pressure behind the eyes can be caused by a watery fluid which fills the front part of the eye. Some people also called it as the aqueous humour. Besides, people with myopia usually have a higher eye pressure than most of people. And have high eye pressure can be very dangerous. A diseases glaucoma results are caused by high eye pressure. And glaucoma is possible to cause vision loss. So, take care of your eyes when you found that you have a higher eye pressure.