Since function governs structure, changes in mood and emotion will also have an effect on the physical structure of the body. The more profound the emotion, the deeper the change in function and structure. Trauma and tragedy create wounds that leave scars on the soul. These scars leave their mark, which appear as craters. The degree of trauma will determine the depth of the crater and the level of disharmony.
Negative emotions create visible physical distortion that manifests as signs in the face and eyes.
Facial expressions are controlled by the twelve pairs of cranial nerves. The cranial nerves are the guardians of the organs of the five senses. Since we experience emotions through the senses, these changes in emotion reflect as facial expressions, wrinkles and distortion. Emotions affect the nervous system and trauma reflects as lesion marks in the iris. Iridology is the analytical science of interpretation of these visible lesions.