Iris color is determined by the amount of brown melanin pigment in the posterior (back) of the iris, whether blue, green or brown, and the occasional golden hue is iris stroma or muscle overlying. Heterochromia is a color difference between eyes. Since you only show one, I canât tell.
Definition of Distal. Distal: The more (or most) distant of two (or more) things. For example, the distal end of the femur (the thigh bone) is the end down by the knee; the end more distant from the torso. The distal bile duct is the far end of the cystic duct, the end away from the gallbladder. And the distal lymph node in a chain of nodes is the most distant one.
In anatomy, proximal is always used to indicate the part that is situated closest to the point of attachment. Even if you find it difficult to remember the meaning of proximal, you can easily relate it with proximity that means nearness or closeness.Distal.istal. In anatomical terms, distal is a point that is located farthest or far away from a standard point of reference. When a doctor uses the term distal to refer to a point in reference to a wound on the arm of his patient, he is referring to a point on the arm closer to the fingers past the wound.