The sclera (white part) is one of the most reactive parts of the eye. Signs in the sclera are usually linked to the status of our health. The sclera can indicate sub-clinical signs, giving us the opportunity to recommend preventative measures. The sclera can be used with the iris as a differential diagnosis to more accurately identify what a person needs to focus on to be the best they can be. Integrated Iridology Module 2.