Most clinical instruments are limited to imaging depths of 2 to 3 millimeters, and it is difficult to switch between imaging the front and back portions of the eye because the eye is composed of elements that bend the light to focus it onto the retina. (sciencedaily.com)
After successfully imaging the front of the eye, he then focused on visualizing the inside lining of the back of the eye, called the retina. (sciencedaily.com)
If you imaging those front and rear bumper inserts as solid it looks classier along with a conventional spoiler. (autocar.co.uk)