Optic nerve

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Overview


This is an image showing the location of the retina, fovea and the optic nerve.
Sagittal (side) view of the eye showing the location of the retina, fovea and the optic nerve
This is an image showing the human retina, which has a red-orange hue. There is a pale orange structure called the optic nerve with blood vessels emanating out supplying the upper and lower half of the retina.
Photograph of the back of the eye showing the retina and the optic nerve

The optic nerve connects our eye and brain together to form a visual image (what we see). When the photoreceptor cells in the retina detect light, an electrical impulse is generated which is then transmitted to the brain through the optic nerve. The location of the optic nerve is a natural blind spot as there are no photoreceptor cells present. However, we do not notice them as the vision of both eyes overlap each other.