The optic nerve
The eye functions much like a camera. The front components help focus light onto a “film” called the retina. Differences in light intensity and color cause chemical changes within the retina. As many as a million nerve fibers carry the impulses from these chemical changes to the brain via the optic nerve. The area where the nerve connects with the retina is known as the optic disc. Pupil – The adjustable opening at the center of the iris that allows light to enter the eye. Retina – A thin lining at the back of the eye that transmits visual impulses via the optic nerve to the brain. Electrical impulses are sent from the retina, through the optic nerve, and to the brain. Nerve fibers connected to the rods and cones come together to form a bundle called the optic nerve. The optic nerve transmits electrical impulses from the retina to the brain. The images projected on the retina are actually upside down, and are communicated to the brain this way. The Retina. The retina is a light-sensitive layer at the back of the eye that covers about 65 percent of its interior surface. Photosensitive cells called rods and cones in the retina convert incident light energy into signals that are carried to the brain by the optic nerve. Optic Nerve. The optic nerve is the cable of nerve fibers with carries the electrical signals from the retina to the brain for processing. The point of departure of that optic nerve through the retina does not have any rods or cones, and thus produces a blind spot. Optic nerve: The optic nerve connects the eye to the brain. The optic nerve carries the impulses formed by the retina, the nerve layer that lines the back of the eye and senses light and creates impulses. These impulses are dispatched through the optic nerve to the brain, which interprets them as images. Using an ophthalmoscope, the head of the optic nerve can be easily seen. The lens is the transparent structure inside the eye that focuses light rays onto the retina. The retina is, as mentioned, the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain. The lens in turn focuses the light rays onto the retina, lining the back of the eye. The retina converts the image formed by the light rays into nerve impulses. The optic nerve, composed of the axons of the, then transmits these impulses from the eye to the first visual relay in the brain. THE TARGETS OF THE OPTIC NERVE. The axons of the collect in a bundle at the and emerge from the back of of the eye to form the optic nerve. The optic nerve is the pathway that carries the nerve impulses from each eye to the various structures in the brain that analyze these visual signals. Confidence votes 73. Second cranial nerve: The second cranial nerve is the optic nerve, the nerve that connects the eye to the brain and carries the impulses formed by the retina -- the nerve layer that lines the back of the eye, senses light and creates the impulses -- to the brain which interprets them as images.  It is only the axons of these ganglion neurons that exit the eye and carry the nerve impulses to the first visual relay in the brain. In addition to this direct pathway from the photoreceptors to the brain, two other kinds of cells contribute to the processing of visual information in the retina. These neurons are the photoreceptors, the only cells in the retina that can convert light into nerve impulses. The photoreceptor layer then transmits these impulses to the bipolar neurons in the second layer and on to the ganglion neurons in the third layer. The deepest layer of neurons processes the light first. These neurons are the photoreceptors, the only cells in the retina that can convert light into nerve impulses. The photoreceptor layer then transmits these impulses to the bipolar neurons in the second layer and on to the ganglion neurons in the third layer.
http://www.vabvi.org/functional-anatomy-of-the-eye/ http://www.visionweb.com/content/consumers/dev_consumerarticles.jsp?RID=35 http://hyperphysics.phy-astr.gsu.edu/hbase/vision/retina.html http://www.medicinenet.com/script/main/art.asp?articlekey=4653 http://thebrain.mcgill.ca/flash/d/d_02/d_02_cr/d_02_cr_vis/d_02_cr_vis.html http://www.answers.com/Q/What_nerve_transmits_impulses_from_nerves_in_the_retina_of_the_eye http://thebrain.mcgill.ca/flash/d/d_02/d_02_cl/d_02_cl_vis/d_02_cl_vis.html http://thebrain.mcgill.ca/flash/d/d_02/d_02_cl/d_02_cl_vis/d_02_cl_vis.html
what nerve carries impulses related to the retina