The coolest thing I was ever able to show someone when it comes to iridology, was when my Aunt was in the hospital due to a stroke. She was given 4 liters of oxygen and saline solution and I'm sure other drugs to save her life...but what was amazing was that I was able to show my sister her eye color change. Our Aunt always had green eyes that matched my sister's eyes. During her time in the hospital, her eyes turned blue like mine. My sister was shocked. Was it due to flushing her system with saline or all that oxygen trying to save her life?...perhaps both? Something to ponder.