what are the steps of vision?
['Light enters the eye through the cornea. ... ', 'From the cornea, the light passes through the pupil. ... ', 'From there, it then hits the lens. ... ', 'Next, light passes through the vitreous humor. ... ', 'Finally, the light reaches the retina. ... ', 'The optic nerve is then responsible for carrying the signals to the visual cortex of the brain.']