The iris is an extension of the brain via the nervous system. An estimated 28,000 nerve fibers attach to the iris, as well as microscopic blood vessels, muscle and connective tissue. Every organ is connected to the iris via the nervous system. The nerve fibers receive their impulses through the optic nerve, optic thalami, and the spinal cord. When an imbalance occurs, a change in the iris will appear.
The iris, its color and markings, reveal information about the state and functioning of every organ in the body as well as levels of inflammation and toxicity. This enables the underlying cause of the symptoms we may experience to be detected and removed. The greatest advantage of iridology over other forms of health screening is that changes appear in the iris before the physical symptoms actually develop. Therefore, preventive action may be taken to improve health and avoid those diseases which might otherwise follow.