2.86 describe the structure and function of the eye as a receptor

Key Points
1. The eye contains tear glands, tear ducts, a cornea, a pupil, the iris, the sclerotic layer, the socket, the eye muscle and the optic nerve to the brain.
2. The function of the eye is to collect light and translate it into images we see with our brain.
3. Going into more specifics about the eye, there is the cilary muscle, which changes the thickness of the lens while focussing. Then there is the aqueous humour, which is the watery liquid filling the front of the eye.
4. There is also the lens, which changes shape to focus light onto the retina, and the retina is the inner light sensitive layer which detects light.
5. The iris controls the amount of light entering the eye, the suspensory ligaments hold the lens in place and the sclerotic is a tough white protective layer. The choroid is the black layer which contains blood vessels, the vitreous humour is the jelly like substance which supports the back of the eye, and the fovea is the most sensitive part of the retina.