What Iridology cannot show

• Blood Pressure Levels (normal or abnormal), Blood Sugar Level and Other Specific Diagnostic Findings and Laboratory Test Results. Iridology can reveal a Lack or an Excess, whether of Substance or a Force, but not the Specific Amount.
• Which Specific Medications or Drugs an Individual is Using or Has Used in the Past. Years ago, when the Drugs prescribed by doctors were Simpler in their Chemical Structure, the Iridologist Could Make a Good Guess as to which one had settled in the tissues by observing the Iris Color (For example, Iron was Rust Colored, Sulphur was Yellow). Modern Drugs are usually compound formulas, and  people today are to be taking Several Drugs).
• What Surgical Operations a Person Has Had (Scar-Tissue sings can be noticed in the Iris).
• Specifically What Foods a Person Does and Does Not Eat. Sometimes an Iridologist can get a pretty fair idea of what General Foods are person consumes.
• How Much Uric Acid is in the Body. Although an Iridologist can tell if someone has too many noxious acids in his body, he cannot tell which specific acids are involved.
• The Time and Cause of an Injury to the Body.
• Whether a Snake Bite is Poisonous and if the Snake Venom Has Entered the Bloodstream. The effects of hundreds of snake bites over a lifetime may show up in the Iris.
• The Correlation Between Tissue Inflammation Levels and Specific Diseases or Symptoms of Disease.
• Diseases by Name.
• Whether a Subject is Male or Female (The Only Clue We Have is the Mascara on the Eyelashes!).
• Whether Asbestos Settlements or Silicosis Exist in the Body. Iridology cannot tell which specific elements have settled in the tissues.
• If Hair is Falling Out and Why - It is not in itself a disease state of the body.
• The Number of Organs With Which a Person Was Born.
• The Presence of a Yeast Infection, such as Candida Albicans. However, Iridology Can Reveal Conditions Supporting Its Possible Presence in the Body.
• The Presence of Lead, Cadmium, Aluminum, or any other Metallic Elements in the tissues.
• If a Woman is on Birth Control Pills.
• If a Woman is Pregnant - Pregnancy is a normal physiological condition for women.
• Whether an Operation is Necessary - This is a medical evaluation.
• Whether a Tumor is Present and What Size it is. The Iridologist can often see the tissue alteration that is represented by a tumor.
• Whether Hemorrhage Exists in the Body or Where it is Located. Hemorrhage, in itself, is not a tissue alteration.
• The Difference Between Drug Side-Effect Symptoms and the Symptoms of Actual Diseases. Iridology cannot differentiate between symptoms.
• Whether Irregular Menstrual Periods are Caused by the Thyroid. It can point out an underactive thyroid gland and thus give a lead for further investigation.
• The Presence of Multiple Sclerosis, Parkinson's Disease, or Bubonic Plague.
• Whether Healing Signs Indicate a Raising of the General Health Level. Healing Signs may be present in just one particular area.
• The Presence of Syphilis, Gonorrhea, or another Sexually Transmitted Disease.
• Orientation Toward Homosexuality. Homosexuality is an alternate sexual orientation and does not involve abnormal tissue alteration.
• The Presence of AIDS. Iridology cannot discern a virus.
• The Presence of Gallstones or Kidney Stones. A stone is not a tissue alteration.
• Whether a Cardiac Artery is Blocked. Iridology can discern if a condition exists that would predispose a person to a blockage of this type.