The Anatomy of the Human Eye
Cornea
The Cornea is a transparent layer over the Pupil, Iris and Anterior Chamber of the eye. The Cornea offers 2/3 of the eyes optical power and is the most sensitive structure of the eye. It can often be describes as the clear glass over a clock face.
Conjunctiva
The Conjuctiva is a thin clear layer that lines the inside of the eyelids and the white part of the eye (Sclera).
Crystalline Lens
The Crystalline Lens is a transparent structure within the which accounts for roughly 1/3 of the eyes optical power. However the power is adjustable, by the changing shape of the lens as it focuses on objects at different distances. This is similar to the focusing lens of a camera.
Iris
The Iris is the coloured part of the eye which controls the size and shape of the pupil.
Pupil
This is a hole n the Iris, through which light enters and hits the retina at the back of the eye. The pupil adjusts to different light conditions hence controlling the amount of light entering the eye and so the clarity of the image perceived. This can be compared with the shutter of a camera.
Retina
This is a light sensitive layer lining the inner surface of the eye. The light that strikes the retina is what createsthe image that we perceive of the outisde world. This is similar to the film in a camera.
Macula
The Macula is found at the centre of the Retina. It is the most central and is specialised for high acuity vision.
Optic Nerve
The Optic Nerve transmits the visual information from the eye to the brain.