Imagine a system so complex it automatically adjusts to changes in light, color, and distance, a system that sends a signal to a receiver and back within a literal blink of the eye. What is this magnificent system? A fancy new camera? Simpler than that: your eyes.
Your sight is dependent on the health of your eyes and how well they are able to perform their duties. You probably already know about the cornea (the transparent membrane that covers the front of the eye), and the retina (a light-sensitive membrane connected to the brain by the optic nerve), the iris and the pupil. Did you know about the macula?
The macula is a small, yellow spot located in the central part of the retina and is composed mainly of lutein and zeaxanthin.