What part of the eye is responsible for vision?
Technically, all parts play their own role when it comes to vision. There’s the cornea, which protects the eye from contaminants, physical intrusion, etc. This is kept moist by tears and the eyelid. Light passes through the iris onto the lens, which focuses incoming light onto the retina in the back of the eye, bringing images into focus for people. Glasses or contact lenses are needed for people who’s lens’ do not focus properly, or who have odd-shaped eyes. The vitrious fluid (clear and gel-like) suspends the lens in the eye, and provides outward pressure to allow the eye to maintain it’s round shape. (so far, as you can see, everything is viatl.) Then, there’s the retina, rods & cones, and ultimately the optic nerve which sends the image to the brain in the form of electric impluses. The brain then merges the images from both eyes to form a 3D image and allow depth perception, among other things. I will assume that you mean, in your question, which part of the eye is responsible for
The entire eye is responsible for vision. The light receptors, however, are on the retina. Quote: The vertebrate retina contains photoreceptor cells (rods and cones) that respond to light; the resulting neural signals then undergo complex processing by other neurons of the retina. The retinal output takes the form of action potentials in retinal ganglion cells whose axons form the optic nerve. Several important features of visual perception can be traced to the retinal encoding and processing of light. # http://en.wikipedia.
