Cognitive behavioral therapy (CBT) is a type of psychotherapeutic treatment that helps patients understand the thoughts and feelings that influence behaviors. CBT is commonly used to treat a wide range of disorders, including phobias, addictions, depression, and anxiety.
The iris regulates the amount of light that enters your eye by adjusting the size of the pupil opening. In bright light, the iris closes (or constricts) and makes the pupil opening smaller to restrict the amount of light that enters your eye. The iris in bright light. In dim light, the iris opens (or dilates) and makes the pupil opening larger to increase the amount of light that enters your eye: The iris in dim light. In addition, it is the iris that determines your eye color.
It supplies nutrients that nourishes the Cornea and Lens and maintains the convex shape of the Cornea along with refracting light onto the pupil. A transparent, jelly-like substance that forms the main bulk of the eyeball. While it maintains the shape of the eye, it also refracts light onto the Retina. The Lens is a transparent, round, biconvex structure.