One of the first things that most designers forget about CSS descendant selectors is that they are flexible. When CSS defines a descendant, it doesn't care whether the tag in question is the direct child, the grandchild, or some great-great-great-descendant of the initial element.
From the retina, visual information passes onto the bipolar cells and then to the optic nerve's ganglion cells. The optic nerve, which begins at the retina, is the sole visual pathway to the brain. Light information is conveyed as an electrical action potential through the neurons.
The visual pathway's primary task of converting light information into a picture of the outside world is moderated by neurons of the visual cortex. In the eye, the visual pathway begins when light passes through the cornea, pupil, and lens, where it is inverted and projected onto the retina.