Define optic nerve?

Define optic nerve?
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1 Answer

Answer :

When light hit the retina its cells make nerve signals these signals pass along the optic nerve to the brain.
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Related questions

What is the function of optic nerve ?

Description : What is the function of optic nerve ?

Last Answer : The function of the optic nerve: to transmit the feeling of vision to the brain (of course, its function can be understood by the name of the optic).

Point at posterior pole, which is jmedial to and slightly above the posterior pole from where optic nerve leave is

Description : Point at posterior pole, which is jmedial to and slightly above the posterior pole from where optic nerve leave is

Last Answer : Point at posterior pole, which is jmedial to and slightly above the posterior pole from where optic nerve leave is

Point at posterior pole, which is jmedial to and slightly above the posterior pole from where optic nerve leave is

Description : Point at posterior pole, which is jmedial to and slightly above the posterior pole from where optic nerve leave is

Last Answer : Point at posterior pole, which is jmedial to and slightly above the posterior pole from where optic nerve leave is

If optic nerve is severed will you lose sight in both eyes?

Description : If optic nerve is severed will you lose sight in both eyes?

Last Answer : no, only in the eye witch the optic nerve is damaged

If optic nerve is severed will you lose sight in both eyes?

Description : If optic nerve is severed will you lose sight in both eyes?

Last Answer : no, only in the eye witch the optic nerve is damaged

Optic nerve atrophy?

Description : Optic nerve atrophy?

Last Answer : DefinitionOptic nerve atrophy is tissue death of the nerve that carries the information regarding sight from the eye to the brain.Alternative NamesSecond cranial nerve atrophyCauses, incidence, and risk ... multiple sclerosis, brain tumor, and stroke.There are also several rare forms of hereditary

I have hypotony and a damaged retina, also some optic nerve damage, although I had a little sight until the hypotony. Any hope for stem cell treatment?

Description : I have hypotony and a damaged retina, also some optic nerve damage, although I had a little sight until the hypotony. Any hope for stem cell treatment?

Last Answer : stem cell treatment as of the moment is a conservative issue whether to continue allowing it or totally ban it. however the answer is yes, almost anything is possible through stem cell research, believe it or not the stem cell treatment could even be a way of stopping aging, all the more hypotony.

In Eye donation, which part of the eye used? A. Retina B. Iris C. Cornea (Answer) D. Optic nerve

Description : In Eye donation, which part of the eye used? A. Retina B. Iris C. Cornea (Answer) D. Optic nerve

Last Answer : C. Cornea (Answer)

The damage to the-----nerve could result in the defect of the eye movement: A. Optic B. Trigeminal C. Abducens (Answer) D. none

Description : The damage to the-----nerve could result in the defect of the eye movement: A. Optic B. Trigeminal C. Abducens (Answer) D. none

Last Answer : C. Abducens (Answer)

Relative afferent pupillary defect is seen in: a. age-related macular degeneration b. optic nerve glioma c. unilateral occipital lobe infarction d. third nerve palsy

Description : Relative afferent pupillary defect is seen in: a. age-related macular degeneration b. optic nerve glioma c. unilateral occipital lobe infarction d. third nerve palsy

Last Answer : optic nerve glioma

The following cranial nerves contain parasympathetic outflow arising at the brain stem: a. optic nerve b. oculomotor nerve c. trigeminal nerve d. facial nerve

Description : The following cranial nerves contain parasympathetic outflow arising at the brain stem: a. optic nerve b. oculomotor nerve c. trigeminal nerve d. facial nerve

Last Answer : facial nerve

Increased intracranial pressure causes: a. sixth nerve palsy b. cupping of the optic disc c. absent venous pulsation d. increased cerebral blood flow

Description : Increased intracranial pressure causes: a. sixth nerve palsy b. cupping of the optic disc c. absent venous pulsation d. increased cerebral blood flow

Last Answer : absent venous pulsation

With regard to pattern electroretinogram: a. it can be used to estimate the visual acuity b. it is generated by the occipital cortex c. it is reduced in optic nerve diseases d. the signal amplitude is about 10 mV

Description : With regard to pattern electroretinogram: a. it can be used to estimate the visual acuity b. it is generated by the occipital cortex c. it is reduced in optic nerve diseases d. the signal amplitude is about 10 mV

Last Answer : it is reduced in optic nerve diseases

When light fell on the eye, the pupil: a. does not constrict if the optic nerve is severed b. does not respond if the sympathetic system is not functioning c. does not respond if the cholinergic system is blocked d. does not respond if the pretectal nucleus is damaged

Description : When light fell on the eye, the pupil: a. does not constrict if the optic nerve is severed b. does not respond if the sympathetic system is not functioning c. does not respond if the cholinergic system is blocked d. does not respond if the pretectal nucleus is damaged

Last Answer : does not respond if the pretectal nucleus is damaged

Direct light reflex of the pupil is absent in: a. lesion of the ipsilateral ciliary ganglion. b. transaction of the ipsilateral optic nerve. c. bilateral occipital lobe lesion. d. topical application of phenylepherine.

Description : Direct light reflex of the pupil is absent in: a. lesion of the ipsilateral ciliary ganglion. b. transaction of the ipsilateral optic nerve. c. bilateral occipital lobe lesion. d. topical application of phenylepherine.

Last Answer : lesion of the ipsilateral ciliary ganglion.

The ciliary ganglion: a. is found between the optic nerve and the medial rectus b. contains sympathetic nerve that supplies the sphincter pupillae c. is a parasympathetic relay ganglion for fibers from the Edinger-Westphal nucleus d. contains sensory nerve e. has a motor nerve that goes to the inferior oblique

Description : The ciliary ganglion: a. is found between the optic nerve and the medial rectus b. contains sympathetic nerve that supplies the sphincter pupillae c. is a parasympathetic relay ganglion for fibers from ... nucleus d. contains sensory nerve e. has a motor nerve that goes to the inferior oblique

Last Answer : is a parasympathetic relay ganglion for fibers from the Edinger-Westphal nucleus

Select the answer with correct matching of the structure, its location and function. Structure Location Function (a) Eustachian Anterior Equalizes air tube part of pressure on internal ear either sides of tympanic membrane (b) Cerebellum Midbrain Controls respiration and gastric secretions (c) Hypothal Forebrain Controls body -amus temperature, urge for eating and drinking (d) Blind spot Near the place Rods and cones where optic are present but nerve leaves inactive here the eye

Description : Select the answer with correct matching of the structure, its location and function. Structure Location Function (a) Eustachian Anterior Equalizes air tube part of pressure on internal ear either sides ... the place Rods and cones where optic are present but nerve leaves inactive here the eye

Last Answer : (c) Hypothal Forebrain Controls body -amus temperature, urge for eating and drinking

In mammalian eye, the ‘fovea’ is the center of the visual field, where (a) only rods are present (b) more rods than cones are found (c) high density of cones occur, but has no rods (d) the optic nerve leaves the eye.

Description : In mammalian eye, the ‘fovea’ is the center of the visual field, where (a) only rods are present (b) more rods than cones are found (c) high density of cones occur, but has no rods (d) the optic nerve leaves the eye.

Last Answer : (c) high density of cones occur, but has no rods

Which of the following terms is used to describe edema of the optic nerve? a) Papilledema Papilledema is edema of the optic nerve.

Description : Which of the following terms is used to describe edema of the optic nerve? a) Papilledema Papilledema is edema of the optic nerve. b) Scotoma Scotoma is a defect in vision in a specific ... edema is a condition characterized by urticaria and diffuse swelling of the deeper layers of the skin.

Last Answer : a) Papilledema Papilledema is edema of the optic nerve.

which medical condition is the eye's optic nerve damaged and the condition worsens over time?

Description : which medical condition is the eye's optic nerve damaged and the condition worsens over time?

Last Answer : Glaucoma

A person was unable to close his right eye. There is dribbling of saliva from right angle of his mouth and he in unable to make a pout. The probable diagnosis is Options: 1) Bell’s Palsy 2) Trigeminal Neuralgia 3) Optic Nerve Injury 4) Oculomotor Nerve Injury

Description : A person was unable to close his right eye. There is dribbling of saliva from right angle of his mouth and he in unable to make a pout. The probable diagnosis is Options: 1) Bell’s Palsy 2) Trigeminal Neuralgia 3) Optic Nerve Injury 4) Oculomotor Nerve Injury

Last Answer : Correct Answer: 1) Bell’s Palsy

The junction of optic nerve and retina is insensitive to light and no image is formed here , it is known as ______. a)blind spot b)yellow spot c) fovea d)pupil

Description : The junction of optic nerve and retina is insensitive to light and no image is formed here , it is known as ______. a)blind spot b)yellow spot c) fovea d)pupil

Last Answer : a)blind spot

Homonymous hemianopia is the result of a lesion in: a. Optic chiasma b. Retina c. optic tract d. Optic nerve

Description : Homonymous hemianopia is the result of a lesion in: a. Optic chiasma b. Retina c. optic tract d. Optic nerve

Last Answer : ANSWER: C  

Optic nerve axon emerges from: a. Ganglion cells b. Rods and cones c. Amacrine cells d. Inner nuclear layer

Description : Optic nerve axon emerges from: a. Ganglion cells b. Rods and cones c. Amacrine cells d. Inner nuclear layer 

Last Answer : ANSWER: A

Optic nerve function is best studied by: a. Direct Ophthalmoscope b. Retinoscope c. Perimetry d. Gonioscopy

Description : Optic nerve function is best studied by: a. Direct Ophthalmoscope b. Retinoscope c. Perimetry d. Gonioscopy

Last Answer : ANSWER: C

Homonymous hemianopia is due to lesion at: a. Optic tract b. Optic nerve c. Optic chiasma d. Retina e. Occipital cortex

Description : Homonymous hemianopia is due to lesion at: a. Optic tract b. Optic nerve c. Optic chiasma d. Retina e. Occipital cortex

Last Answer : ANSWER: A

Cornea is supplied by nerve fibers derived from: a. Trochlear nerve b. Optic nerve c. Trigeminal nerve d. Oculomotor nerve

Description : Cornea is supplied by nerve fibers derived from: a. Trochlear nerve b. Optic nerve c. Trigeminal nerve d. Oculomotor nerve

Last Answer : ANSWER: C  

Define a fiber optic splice.

Description : Define a fiber optic splice.

Last Answer : A permanent fiber joint whose purpose is to establish an optical connection between two individual optical fibers.

Define olfactory nerve?

Description : Define olfactory nerve? 

Last Answer : Nerve cells pass the messages to the brain through the olfactory nerve  

Define Neurons and Nerve?

Description :  Define Neurons and Nerve? 

Last Answer : The basic structural and functional unit of nervous system is called neurons A nerve is bundle of axons that transmit messages from one part of body to another

Define Nerve.

Description : Define Nerve.

Last Answer : It is an enclosed, cable like bundle of axons present side by side in a common sheath. Nerve conveys messages carried by the individual neurons from one body part to another.

Define Nerve impulses

Description : Define Nerve impulses

Last Answer : Neurons carry messages in the form of electro-chemical waves called nerve impulses.

Define Neuron or Nerve Cell.

Description : Define Neuron or Nerve Cell.

Last Answer : Neuron or nerve cell is the basic structure and functional unit of the nervous system. All parts of the nervous system are made up of neurons.