The eye is incredibly complex and knowing how the human eye works will give you a better understanding of how delicate this organ is. This section will give you a detailed understanding of how the parts of the human eye work. Good vision depends on the way in which those parts work together.
- The eye is made up of three parts:
- The cornea and lens focuses light to the front of the eye.
- The retina is a light focusing film at the back of the eye.
- The optic nerve connects each eye to the brain.
Cornea: the transparent outer portion of the eyeball that transmit light to the retina.
Retina: the inner layer of the eye containing light-sensitive cells that connect with the brain through the optic nerve. It also contains retinal blood vessels which feed the retina and which can be affected by diabetes.
Optic Nerve: carries messages from the retina to the brain.
Iris: the coloured, circular part of the eye in front of the lens.
Pupil: is an opening located in the center of the iris of the eye that allows light to enter the retina.
Lens: located in the middle of the eye behind the pupil, the lens brings rays of light into focus on the retina.
Aqueous Humor: is the fluid normally present in the front and rear chambers of the eye. It is a clear, watery fluid that flows between and nourishes the lens and the cornea.
Fovea: the pit or depression at the center of the macula that provides the greatest visual acuity, most acute vision.
Vitreous Humor: a colourless mass of soft, gelatin-like material that fills the eyeball behind the lens.