For a modern Day Chiropractor in Grand Rapids MI, I am nicely aware about the astigmatism of Chiropractic treatment. Having said that, we are literally a doctor in Science with research demonstrating the measurements in degrees to the purely natural curve on the spine. Wager you didn't know that! http://chiropractic69886.timeblog.net/23519378/the-ideal-chiropractor-in-grand-rapids