I’m listening to a Q and A session right now.  The questions are rudimentary and we haven’t gotten to much that is new to me  yet.  But even a rudimentary question can refresh the memory and trigger new thoughts. So it does have value and why not join?  It is good to collaborate with others and learn more.  This is very cool.  I hope that I learn something good.  It’s like  vision improvement it takes time and effort.  This is something that everyone should be interested in, given the level of problems we are having with our vision with all of the near work that we do in this modern age.