There are several cases of blurred eyes when sleeping on your back: 1, may be the eye because of pressure caused by refractive changes, especially easy to cause corneal astigmatism, with the pressure to lift the refractive state back to normal, the eyes will also see things clearly. 2, some are caused by pressure caused by ischemia or transient ischemia of the eye, the pressure is lifted after the vision also returned to normal, so you can not sleep with pressure on the eye, to sleep on the side or supine Sleep is appropriate, noon sitting rest also can not lie on the table pressure on the eyeballs to sleep. 3, lying down to sleep up eyes to see things blurred if persistently can not return to normal, generally is the lens displacement or dislocation, glaucoma, fundus disease, optic nerve disease, etc. caused by the need for eye examination as soon as possible, such as slit lamp, fundoscopy, measurement of intraocular pressure and other tests to clarify the diagnosis, according to the condition of the decision to choose a treatment method.