For all those out there suffering from chronic eye ball pain and not knowing the cause, here is a prognosis which you may wish to consider degenerative osteoarthritis of the occipital cervical neck joints C1, C2 and the joints internal peg which generate pain not always felt at the neck joints.In my personal experience severe chronic neck pain can be controlled by strong analgesics, however, the brain can only block out so much pain, any residual chronic pain passes from the brain to the optical nerve path that enRAB at the eye balls.
When neck pain is chronic but suppressed by analgesics a good way of checking your eye balls for pain is by "rolling them". If pain is experienced a higher dose of analgesic may be required and the prognosis of the neck joints C1, C2 and the internal peg is confirmed, in my personal experience, as degenerative osteoarthritis.