CSF pressure

I am copying below part of a message I wrote under the CSF subject earlier. Some might have missed it.  Yawning, as practiced by Olympic champion Apollo Ohno before competing, has a very practical and powerful neurological benefit, as it turns out. The brain and/or CSF response to yawning may be very good re: lowering IOP.  I am hoping that several of you with tonometers will give it a thorough test.  Here is the earlier message I wrote, and then I will describe the procedure for the conscious yawning exercise, which is not just one simple yawn: