What is the implication of a mark on the back of the eye when it appears black in a red free filter viewing?

Retinal ganglion cells fire at a variety of rates depending on characteristics of the visual stimulus. Select one: True False

Please explain the concepts of amplitude and wavelength, visual spectrum, cornea, pupil, cones, and rods. Why does the blind spot exist? What is meant by binocular cues and binocular disparity?

What order does light pass through the structures of the eye, from superficial to deep? These are the strucutres i need put in order:   Sclera –    Cornea –    Choroid –    Ciliary body –    Ciliary muscle –    Iris –    Pupil -    Retina –    Optic nerve –    Vitreous humor –    Optic chiasma    Optic nerve –  Optic tract –