It helps you see
It was a tube with optic vision. Optic means something to do with vision. It meant a vision tube.
Symptoms of optic atrophy are a change in the optic disc and a decrease in visual function
Optic nerve and ophthalmic artery passes through this foramen to your eye ball.
The long tube
it is part of the Squids eye Sight...
It is not a function, it is where the optic nerve connect from the eye to the brain. Because of this there are no photo-receptors at that point.
so the squid can see it's prey and predators and other objects
it is use to hold the test tube
Depends on the characteristics of the tube. Coat the interior surface with a (perfect) mirror finish, and the laser beam will continue quite happily. Fill the tube with either multiple fiber optic strands, or build it like one huge fiber optic strand and the beam will continue as well.
It's the place in the eye where axons exit the eye to form the optic nerve, and where blood vessels enter to nourish the retina.
The optic disc in the human eye is the part of the eye that is connected to the retina and carries visual information to the thalamus and other parts of the brain.
it is basicaly a glass light tube that shoots coded light signals through it and is safe from emi