The Eye
Cornea
convex in shape and allows some refraction of the light as it enters the eye
Transparent part covering the front of the eye
It also provides the eye with protection from dust and debris.
Pupil
allows light to enter the eye before it reaches the lens
Appears black because light that passes through the pupil is absorbed by the retina.
the opening in the centre of the iris
Iris
Muscles within it control the size of the pupil
Regulates the amount of light passing through the pupil and entering the eye.
The coloured part of the eye
Lens
A clear disk behind the iris
It completes the focusing of light onto the retina.
Ciliary muscle
Ciliary muscle helps change the shape of the lens to focus light.
suspensory ligaments.
Suspensory ligaments connect the ciliary muscle with the lens.
Retina
Images that enter the eye are focused on the retina
Contains rod and cone cell
converted into electrical signals which pass through the optic nerve to the brain.
Macula
responsible for central vision of objects directly in front of you
fine detail and most of our colour vision.
Part of the Retina
Optic nerve
a bundle of nerve fibres that transmit visual information to the brain from the eyes.
cerebral cortex processes sensory information.
Located at the back of the eye
Humours
It distributes nutrients to nourish the eye
helps to refract light and protect the retina
Gel like fluid which fills the eye and helps to maintain the shape
Conjunctiva
A membrane that forms a thin protective layer across the front of the eye and lines the inside of the eyelids.
Tear glands
this liquid drains away through tear ducts in the corner of each eye.
continuously produce liquid to moisten the surface of the eye