This is a very big subject but so very interesting and useful. Iris Analysis originated in Hungary in the early 1800’s through the work of a physician named Ignatz Von Peczely. The story goes that he noticed a black line that appeared in the iris of the owl he was handling when it’s leg broke. As the leg healed the black line changed and filled in. He took this experience into his medical practice and began observing the irises of his patients and the changes in their irises that coincided with injuries, surgeries and illnesses. Through this research he concluded that there is a reflex relationship of some kind between the various markings in the iris and the rest of the body. He created the first chart of the iris showing the relationship between certain organs and structures and where they are reflected in the iris.
Simultaneously, the Swedish clergyman Nils Liljequist observed a relationship between the large doses of tonic drugs that were used to treat illnesses at the time and corresponding discolorations in the iris of the eye.
This reflex relationship where the entire human organism is represented in a smaller part of the body is not unique to Iridology and often presents a two way relationship where the reflex area can be used both for diagnosis and treatment. Some examples of these small reflex areas are the foot ( foot reflexology), the hand, the ear (auricular acupuncture) and the scalp (neuroacupuncture) . There is a clear neurological tissue developmental connection during embryological development. In their paper on the development of the eye,
Dr. Victoria Ort and Dr. David Howard state that “the major development of the eye takes place between week 3 and week 10 and involves ectoderm, neural crest cells, and mesenchyme. The neural tube ectoderm gives rise to the retina, the iris and ciliary body epithelial, the optic nerve, the smooth muscles of the iris and some of the vitreous humor.” The eye develops from the neural plate and the primitive embryological tissue known as the neuroectoderm. This tissue further differentiates into the nervous system (spine, peripheral nerves and brain), tooth enamel and the epidermis (outer skin). So, there is a developmental, histological, embryological and energetic connection between the iris and the central nervous system and therefore the entire body.
Over the past 200 years many scientists and doctors have increased the knowledge and understanding of iris analysis, revising and improving the iris chart. Dr Bernard Jensen is the primary developer of Iridology in the United States. His chart is the most accurate and up to date in the world today.