Iridologists see the eyes as "windows" into the body's state of health. Iridology alternative medicine technique uncovers potential health conditions by examining the colored area of the eye, known as the iris. This practice generally utilizes cameras, flashlights, and microscopes to examine the patient's iris in order to detect tissue change, irregularities, and pigment patterns. Patterns, colors, and other characteristics of the iris can be examined to determine information about a patient's systemic health. Details in the iris reflects changes in the tissues of corresponding body organs and can detect hypertension, liver damage, gallbladder issues, inflammation, digestive issues, high cholesterol, allergies, and a weakened immune system.