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ANATOMY OF THE HUMAN EYE Sunday, October 30, 2005. Optic Nerve Answers. The optic nerve is the bundle of axons that extend from the cell bodies of ganglion cells in the retina to synapse on the lateral geniculate body in the brain. The optic nerve as a structure begins at the optic disk. A smaller, disc-shaped depression, called the cup, lies slightly temporal to the center of the optic disc.
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Optic Nerve The optic nerve carries electrical impulses from the eye to the brain, which converts the impulses into the things that you see. ByHealthwise Staff. Primary Medical ReviewerAdam Husney, MD - Family Medicine. Specialist Medical ReviewerChristopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology.
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Optic nerve The vast majority of optic nerve fibres convey information regarding central vision. 1  The optic nerve begins at the optic disk, a structure that is 1.5 mm (0.06 inch) in diameter and is located at the back of the eye. The optic disk forms from the convergence of ganglion cell output fibres (called axons) as they pass out of the eye.
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Optic nerve Anatomical terms of neuroanatomy. The optic nerve, also known as cranial nerve II, is a paired nerve that transmits visual information from the retina to the brain. The optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell axons and glial cells.
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- The axons of the 3° visual afferents (the retinal ganglion cells) form the optic nerve fiber layer of the retina on their course to the optic disc. At the optic disc, the 3° visual afferents exit the eye and form the optic nerve. The fibers of the optic nerve that originate from ganglion cells in the nasal half of the retina (i.e., the nasal hemiretina) decussate in the optic chiasm to the opposite optic tract (Figure 15.1).
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Optic disc drusen Anatomy [edit]. The optic nerve is a cable connection that transmits images from the retina to the brain. It consists of over one million retinal ganglion cell axons. The optic nerve head, or optic disc is the anterior end of the nerve that is in the eye and hence is visible with an ophthalmoscope.It is located nasally and slightly inferior to the macula of the eye.ptic disc drusen (ODD) or optic nerve head drusen (ONHD) are globules of mucoproteins and mucopolysaccharides that progressively calcify in the optic disc. They are thought to be the remnants of the axonal transport system of degenerated retinal ganglion cells.
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Optic Nerve Drusen The optic nerve is the round, yellow/pink area with the blood vessels radiating out of the center. Figure 2 shows an eye with optic nerve drusen. You can see that this nerve appears elevated and the edges are “bumpy” and less sharp than the normal optic nerve in figure 1- which is flat and has sharp borders.
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Retina Anatomy Retinal nerve fibers exit the eye through the optic nerve, located nasally and on the same plane as the anatomical center of the retina. There is no retinal tissue overlying the optic nerve head. The optic nerve head or optic disc is oval in shape and measures approximately 1.75 mm. vertically and 1.5 mm horizontally. The center of the optic disc is located 4.5 mm to 5 mm nasal to the anatomical center of the retina.
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Optic nerve The optic nerve, also known as cranial nerve II, is a paired nerve that transmits visual information from the retina to the brain. The optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell axons and glial cells.
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- Anatomy, Physiology & Pathology of the Human Eye. Included are descriptions, functions, and problems of the major structures of the human eye: conjunctiva, cornea, iris, lens, macula, retina, optic nerve, vitreous, and extraocular muscles.A glossary is included.There also is a test for color deficiency and two short quizzes.natomy, Physiology & Pathology of the Human Eye. Included are descriptions, functions, and problems of the major structures of the human eye: conjunctiva, cornea, iris, lens, macula, retina, optic nerve, vitreous, and extraocular muscles.
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Medical Definition of Optic nerve The lens is the transparent structure inside the eye that focuses light rays onto the retina. The optic nerve is the nerve that connects the eye to the brain and carries the impulses formed by the retina to the visual cortex of the brain.
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Optic Nerve ganglion cell axons exit the eye via optic disc to form the optic nerve. optic disc located nasal to fovea (red spot in the eye; high acuity area); no cones or rods in the optic disc so it becomes our blind spot. optic disc has a neural retina rim and physiological rim (optic cup) (latter varies among individuals) Types of Clinical Defects seen w/ Optic Nerve Disorders.
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- The Optic Nerve. As well as numerous blood vessels, the eye also contains the optic nerve. This runs from the back of the eyeball, through an opening in the orbit known as the optic foramen. From here, the optic nerve connects to the brain and acts as a conduit, transmitting visual information into the brain.he rest of the eye (the scleral segment) is opaque. Several nerves and blood vessels run through the sclera, including the optic nerve. The cornea and scleral segment come together in an area called the limbus.
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Optic Disc & Optic Nerve Nervous Layer. The optic disc is a round area in the back of the eye where retinal nerve fibers collect to form the optic nerve. The optic disc is sometimes called the optic nerve head because it is the head of the optic nerve as it enters the eye from the brain. It is located slightly to the nasal side of the globe.
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Flow of Aqueous Humor Optic nerve: The bundle of nerve fibers at the back of the eye that carry visual messages from the retina to the brain. Photoreceptors: The light sensing nerve cells (rods and cones) located in the retina. Pupil: The adjustable opening at the center of the iris through which light enters the eye. Retina: The light sensitive layer of tissue that lines the back of the eye.
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The Optic Nerve As the optic nerve leaves the back of the eye, it travels to the optic chiasm, located just below and in front of the pituitary gland (which is why a tumor on the pituitary gland, pressing on the optic chiasm, can cause vision problems).
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The Optic Nerve (CN II) and Visual Pathway Anatomical Course. The anatomical course of the optic nerve describes the transmission of special sensory information from the retina of the eye to the primary visual cortex of the brain. It can be divided into extracranial (outside the cranial cavity), and intracranial parts. Extracranial.
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- Optic Nerve. The Optic Nerve, also called Cranial Nerve II, is the nerve that transmits visual information from the Retina to the Brain. Optic Disc. The Optic Disc or Optic Nerve head is the point in the eye where the optic nerve fibers leave the retina.Due to absence of light sensitive rods and cones of the retina at this point, it is not sensitive to light and thus is also known as The Blind Spot or Anatomical Blind Spot.etina. The Retina is a thin layer of neural cells that lines the back of the eyeball of vertebrates and some cephalopods. In embryonal development, the retina and the optic nerve originate as outgrowths of the brain.
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The Optic Nerve The optic nerve (also known as cranial nerve II) is a continuation of the axons of the ganglion cells in the retina. There are approximately 1.1 million nerve cells in each optic nerve. The optic nerve, which acts like a cable connecting the eye with the brain, actually is more like brain tissue than it is nerve tissue.
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How Glaucoma Affects the Optic Nerve The optic nerve is the part of the eye that carries visual information from the eye to the brain. It is located at the very back of the eye just to the nose side of center. It is also the part of the eye that gets injured when someone has glaucoma.
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- Optic nerve. For other uses, see Optic Nerve. The optic nerve, also known as cranial nerve II, is a paired nerve that transmits visual information from the retina to the brain. The optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell axons and glial cells.
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Optic disc drusen Anatomy[edit] The optic nerve is a cable connection that transmits images from the retina to the brain. It consists of over one million retinal ganglion cell axons. The optic nerve head, or optic disc is the anterior end of the nerve that is in the eye and hence is visible with an ophthalmoscope. It is located nasally and slightly inferior to the macula of the eye.
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Optic Disc & Optic Nerve Optic Disc & Optic Nerve. The optic disc is a round area in the back of the eye where retinal nerve fibers collect to form the optic nerve. The optic disc is sometimes called the optic nerve head because it is the head of the optic nerve as it enters the eye from the brain. It is located slightly to the nasal side of the globe. The optic disc is known as the blind spot because it contains no photoreceptors.
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The Optic Nerve The optic nerve (also known as cranial nerve II) is a continuation of the axons of the ganglion cells in the retina. There are approximately 1.1 million nerve cells in each optic nerve. The optic nerve, which acts like a cable connecting the eye with the brain, actually is more like brain tissue than it is nerve tissue.ptic atrophy of the optic disc (visible to an eye doctor looking inside the eye) is the result of degeneration of the nerve fibers of the optic nerve and optic tract. It can be congenital (usually hereditary) or acquired.