You are herepostural hypotension
postural hypotension
Can Relaxation Increase Eye Pressure?
Someone made the following comment in regard to my statement that stress increases my eye pressure.
"I have to say I've had my pressures checked at the doctor's when I was extremely stressed out, only to get a low reading, and had the pressure checked when I was relaxed and gotten a high reading. Other times I've been tense and gotten a high reading and relaxed and gotten a low reading. But based on my experiences of having pressure checked in the doctor's office, I can't say for sure whether or not stress affects my IOP - not that reducing stress isn't a bad idea."
Postural Changes and Eye Pressure
I found this data interesting. It hints that I sometimes have eye pressure changes related to postural changes. In the chart below, you'll see that my eye pressure went from 17 to 23 to 17 very quickly after I went from lying down to standing (and then sitting).
Speedy Changes in My IOP
Probably the most interesting thing about today's data is the series of measurements behind the IOP value at 19:20 (7:20 PM) for my right eye.  
