![]() ![]() Essentially, all visual signals are transmitted from the eye to the brain via this pathway, and as a result any injury to this nerve structure can cause vision loss, with the level of impairment depending on the severity and location of the damage. The optic nerve (occasionally referred to as cranial nerve II or CN II) is a structure consisting of millions of fibers and is responsible for everything from the dilation and contraction of the pupil (the light reflex) to how words and images are viewed up close or at a distance. This is why the optic nerve, acting as a type of bridge between the two, plays such a critical role in how we see the world. The eye and brain are intricate, complexly structured organs, and their function in the visual process can’t be performed correctly if they’re not properly connected to each other. Within the eye is the retina, the cells of which are responsible for perceiving, processing, and relaying information to the brain, where the decoding of the received signals takes place and our actual visual experience occurs. ![]() Our visual system is comprised of three major parts: the eye, the visual cortex (located in the brain), and the pathway that connects them. What is this nerve and why is it so essential to our sight? To answer this question we first have to understand what actually takes place in the physical act of seeing. STRUCTURE, FUNCTION, DAMAGE / DISORDERS, AND TREATMENT ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |