For a modern-day Chiropractor in Grand Rapids MI, I am well aware of the astigmatism of Chiropractic care. On the other hand, we are literally a doctor in Science with scientific studies exhibiting the measurements in degrees to the all-natural curve in the spine. Wager you didn't recognize that! http://connerjwhrb.bleepblogs.com/900797/the-top-chiropractor-in-grand-rapids