The same may be said of the dorsal region as of the lumbar in regard
to curvatures. There is one individual lesion in this region that very
frequently exists with eye troubles, i. e., the 2nd dorsal vertebra
lateral. Any of the upper four dorsals in lesion may be a causative
factor in predisposing to disease of the eye but it has been my
observation that the 2nd is involved most often. In severe headaches
due to eye strain from refractive error, a good diagnostic symptom is
tenderness and contraction at the 2nd dorsal even when there is no
subluxation.