From the abstract: "Determination of blood flow by x-ray in 18 of our cases shows that blood flow of the cerebral hemispheres greatly improves after manipulative treatment. The same is true in similar animal tests."
From the paper: "At the 1978 year end 3120 cases of cervical syndrome of which 30 were associated with hypopsia and blindness were summed up with satisfactory results found after manipulative treatment. Vision was restored to no less than 1.0 in 4 cases with blind-ness."
Zhang C, Wang Y,Lu W, et al. J Tradit Chin Med. 1984 (Sep);4 (3): 205-210