Sorry to hear about the eye, Jed...I have gotten hurt before, too, not doing the "tree work" but the ancillary "safe" stuff...like coiling ropes, pulling my snap back to me thru a crotch and almost getting busted in the face, etc.
I have started wearing the TreeStuff mesh glasses pretty much all the time...no fog and constant eye protection.
Though I went to a chainsaw safety class last week and the instructor made me realize the mesh is probably not good for projectile protection (like if a piece of chain metal breaks off at speed and hits you...I had not thought of that scenario until he brought it up...I always figured wood chips were the main worry...guess plastic wedge chips could be a problem, too).
Was that fractured top cut a Coos Bay type cut...the hinge wood looks triangular.
Was the trunk fractured before you made your cut?