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Doctor insights on: What Is The Function Of The Optic Nerve

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What are the functions of the optic nerve, the retina, the iris, the cornea, and the pupil?

What are the functions of the optic nerve, the retina, the iris, the cornea, and the pupil?

The visual pathway: Light passes through the cornea, which is the front "windshield" of the eye and helps focus the light. The iris works as a muscle to increase or decrease the size of the pupil; this controls how much light comes into the eye. Light hits the retina, which converts the light into signals which are sent, via the optic nerve, to your brain. ...Read more

Nerve (Definition)

The brain and spinal cord communicates with what is occurring in the internal organs and limbs by nerve fibers where are like electrical wires with insulation (myelin) and the "copper" (axon). Within brain and spinal cord these nerves connect to other nerves via synapses on both axons and dendrites. A nerve can carry information regarding sensations, and ...Read more


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Function of the optic nerve?

Function of the optic nerve?

Optic nerve: The optic nerve carries the signal from the retina to the brain. ...Read more

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Explain the optic nerve?

Explain the optic nerve?

Visual cable: The optic nerve, the head of which is described in the back of the eye by your ophthalmologist as the disc, is the cable carrying visual information into the brain where it ends up in the occipital lobe and interpreted as vision. It contains over 1.2 million fibers as well as supporting elements.A truly amazing nerve. ...Read more

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What is the optic nerve?

What is the optic nerve?

Optic nerve: The optic nerve is at the back of the eyeball and transmits visual information from the eye to the brain. ...Read more

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What's an elevated optic nerve?

Nerve swelling: Elevated optic nerve means one which which protrudes from the optic disc in back of the eye. This may developmental, or related to eye shape, or to swelling of optic nerve. Ask your ophthalmologist to explain these possibilities to you--it's part of his/her responsibility--i.e., education, instead of baffling you with medicalese. ...Read more

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What could block the optic nerve ?

What could block the optic nerve ?

Many causes: The optic nerve can be affected by trauma, infection, vascular occlusion, tumors in the optic canal or on the pituitary, or inflammatory processes like multiple sclerosis. If there is a sudden change in the vision, which is a hallmark of optic nerve dysfunction, see your ophthalmologist right away. ...Read more

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Are there people with no optic nerve?

Birth defect: A few are born with significant maldevelopment (mostly loss) of an eye with loss also of the optic nerve. There are many with varying degrees of optic nerve dysfunction but they of course still have a nerve. An eye with no optic nerve would be totally blind. ...Read more

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What exactly is a tilted optic nerve?

What exactly  is a tilted optic nerve?

Tilted: Most optic nerves enter the eye straight on, like a cable pushed into a styrofoam ball perpendicular to the surface. In some eyes, the optic nerve enters at an angle, leading to a tilted appearance. This occurs most commonly in nearsighted people (myopes). ...Read more

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How frequently does optic nerve change etc?

Very stable: The optic nerve is a stable structure which does not spontaneously change. It can be affected by glaucoma, nervous system disease like MS and a variety of other conditions mostly uncommom. ...Read more

Optic Nerve (Definition)

The optic nerve receives input from the retina and transmits information to the optic chasm and ultimately the occipital lobe of brain so that images can be ...Read more