Joshua L.:
Are fruitions always followed by bliss waves?
No.
Joshua L.:
Can the eyes ever tighten very strongly during a fruition, to the point of discomfort?
Yes.
As an aside, it may be a good idea to avoid using "always" and "ever" in your questions, as that tends to put things too far out into the realm of the theoretical. You can try to frame the questions differently. For example:
"Have any of you experienced fruition, but didn't experience a bliss wave afterward?"
"Has anyone else had the experience of their eyes tightening strongly during fruition, to the point of discomfort?"
It's a subtle difference, but it really opens the questions up for better answers.
-Jackson