What is iridology eye chart diagnosis?   What is iridology? Iridology also commonly referred to as Iridology analysis, also mistakenly referred to as, Iris diagnosis, or Iridology diagnosis, is the study of the iris of the human eye. A more formal description as stated by World renowned American Iridologist, Ellen Tart-Jensen is, “Iridology is the study of the color, pigmentations, …