Q. 155.0( 4 Votes )

What are the functions of optic nerve and retina?

Answer :

Optic nerve: Also called cranial nerve II (second cranial nerve). The optic nerve is present in the back of the eye. The function of the optic nerve is to transfer visual information from the retina to the vision centers of the brain. The information is carried in the form of electrical impulses.


Retina:


The retina is the membrane (tissue) that covers most of the inner surface of the eyeball. It contains hundreds of millions of light-sensitive cells, called cones and rods. Rod and cone cells are also called receptors (or photoreceptors). When a ray of light is falling on the retina, the cells present over the retina get activated and convert it into nervous signals (electrical impulse) which are transported to visual centers in the brain by the optic nerve.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Lets Learn the Reflection of LightLets Learn the Reflection of LightLets Learn the Reflection of Light43 mins
NCERT Exemplar | Part-1 (Light)NCERT Exemplar | Part-1 (Light)NCERT Exemplar | Part-1 (Light)40 mins
Lakhmir singh | Part-3 (Light)Lakhmir singh | Part-3 (Light)Lakhmir singh | Part-3 (Light)45 mins
NCERT Exemplar | LightNCERT Exemplar | LightNCERT Exemplar | Light37 mins
Quiz | Lets Have a Faceoff with Light!!Quiz | Lets Have a Faceoff with Light!!Quiz | Lets Have a Faceoff with Light!!37 mins
Quiz | Imp. Qs. on LightQuiz | Imp. Qs. on LightQuiz | Imp. Qs. on Light36 mins
Rapid fire quiz on LightRapid fire quiz on LightRapid fire quiz on Light39 mins
Quiz | Lets Revise LightQuiz | Lets Revise LightQuiz | Lets Revise Light29 mins
Lakhmir Singh | LightLakhmir Singh | LightLakhmir Singh | Light45 mins
Foundation | Multiple Reflections of LightFoundation | Multiple Reflections of LightFoundation | Multiple Reflections of Light38 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses