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Discus nervi optici

From Biology-Online Dictionary | Biology-Online Dictionary
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Discus nervi optici --> optic disk

The portion of the optic nerve seen in the fundus with the ophthalmoscope. It is formed by the meeting of all the retinal ganglion cell axons as they enter the optic nerve. Because the retina at the optic disk has no photoreceptors there is a corresponding blind spot in the visual field.