We Look at Every Patient as a Whole
Dr. Tennant was first trained as a physician that understood that the human body is not simply a collection of independent parts but rather an integrative whole. He specialized in ophthalmology but continued to look at how other functions affected vision.
Throughout his 50 years in medicine, Dr. Tennant has recognized that the heart, brain, lungs, kidneys, and blood pressure affect every organ in the body. For example, cardiologists like to lower the blood pressure as much as they can to "take the pressure off the struggling heart." However, the amount of oxygen the cells in the optic nerve receive and how much eye pressure they can tolerate is a function of blood pressure. Thus the level of your blood pressure has a bearing on what eye pressure level will lead to glaucoma. But when was the last time your eye doctor checked your blood pressure?
It is well documented that the thyroid hormone T-3 controls the function of all the cell membranes in the body and the thryoid hormone T-2 controls the function of all the mitochondria that generate ATP (cellular voltage). Thus every physician should be aware of the Free T-3 levels in the body no matter what organ is the speciality of that physician.
Thus we practice "standard-of-care" guidelines and remain aware of the physiology taught in every medical school in the world in order to look at every patient as a whole not just just disconnected parts.