It took over TWO HOURS of major surgery to start fixing Jason London's busted face -- following a crazy bar fight in Scottsdale -- and TMZ obtained the gruesome post-op pic.
A source close to Jason tells TMZ that the actor went under the knife Saturday at a Los Angeles hospital (the first of several surgeries to come) to repair a deep nasal fracture, a severe orbital floor fracture and have a titanium plate inserted into the right side of his face.
We're told Jason feels as bad as he looks -- he's in a severe amount of pain following the surgery, but is trying to keep his spirits up.
Jason isn't out of the woods yet. We're told he still has orthopedic and eye surgeries left to go and it will be a "very long time" before he is functional.
TMZ broke the story ... Jason suffered some pretty brutal injuries stemming from last week's brawl ... including multiple face fractures, contusions, hematomas and a concussion.
And as we previously reported, Jason was arrested directly after the melee for disorderly conduct and assault. He remains adamant, the fight wasn't his fault and the bar staff assaulted HIM.