The eyes convey information about the body as a live presentation. Changes do not occur after a night of drinking or something recent that has happened. In fact, Iridology show how illness can be built. When a major organ degenerates, Iridology can see it happening years, even decades before conventional medical screening(i.e. blood tests do not assess the relative strength of an organ or provide preventative support).
Markings are both genetic(genotype) and accumululated in life(phenotype). A common genetic mark looks like a hole in the iris topography. Typically, the signs of degeneration will have assosciated symptoms, but not always. The person may not have any feelings at all to do with a degeneration mark in their eyes. Mostly, however, signs in the eyes have very valuable information about why a person is ill. Diseases are not diagnosed through Iridology, even though signs can show the potential for an illness.
Healing reveals itself too. When an organ becomes strengthened through various methods of healing, the eyes show the changes. These healing signs look like white bands moving from the pupil outwards. They indicate inflammation, the first sign of healing, and often accompany a healing crisis. A healing crisis follows "Herring's Law of Cure". Namely, ill healing happens from in the inside out(digestion/pupil to skin), from the head down, and in the reverse order that symptoms appeared. The healing crisis discribes how in the process of healing, our body has symptoms from the very illness we are working to heal! Often, symptoms of older illness will return in the process.
An Iridologist can tell what will heal first because those are the signs that are the least progressed(in the reverse order). The more degenerative the organ, the darker the lesion. It is that simple! Can you believe you have a perfect map to your body's state of health in your eyes? It's a miracle!