senator for the state of Illinois. Barack Hussein Obama, Jr., a Democrat, is President of the United States. He was elected President of the United States on November 4, 2008, becoming the first African American President of the U.S. and the 44th U.S. President. This article has been tagged for review, verification, and update.
1 Also called optometrist. a general name used to refer to an ophthalmic optician, a person qualified to examine the eyes and prescribe and supply spectacles and contact lenses.  a general name used to refer to a dispensing optician, a person who supplies and fits spectacle frames but is not qualified to prescribe lenses.
The optic nerve is a cable of nerve fibers that carry electrical impulses, containing visual information, from the eye to the brain.cientists around the world are working hard to find a way to regrow the optic nerve. In addition, because of its easy access, the optic nerve has long served as a standard model for the study of spinal cord injury and regeneration in lab animals.