Not true regarding Optic Nerve
CRANIAL NERVE Optic nerve arises from ganglion cell axons. *Length = 47-50mm. *Can be considered as pa of brain *3rd order neuron *Protected by meninges *Pas: Intraocular, Intraorbital, intracanalicular, intracranial *Smallest pa of optic nerve is intraocular *Longest pa : Intraorbital Order of Neurons *Rods & Cones (Photoreceptors) *Bipolar Cells: 1st order Neuron *Ganglion Cells: 2nd order Neuron *Neurons that take impulse from LGB to Brain: 3rd order neuron
Made of axons of 2nd order neuron in visual pathway
47-50 mm length
Intracranial pa is the longest
Smallest pa is intraocular
Squint