THE EYE
Learn the part of the eye and the function of each part.
Parts of the eye
|
Function
|
Cornea
|
This dome-shaped layer protects your eye from
elements that could cause damage to the inner parts of the eye.
|
Sclera
|
This is a smooth, white layer on the outside. The sclera provides
structure and safety for the inner workings of the eye, but is also flexible
so that the eye can move to seek out objects as necessary.
|
Pupil
|
The pupil appears as a black dot in the middle of
the eye. This black area is actually a hole that takes in light so the eye
can focus on the objects in front of it.
|
Iris
|
The iris is the area of the eye that contains the pigment which gives
the eye its colour. This area surrounds the pupil, and uses muscles to widen
or close the pupil. This allows the eye to take in more or less light
|
Lens
|
The lens sits directly behind the pupil. This is a
clear layer that focuses the light the pupil takes in. It is held in place by
the ciliary muscles, which allow the lens to change shape depending on the
amount of light that hits it so it can be properly focused.
|
Retina
|
The light focuses by the lens will be transmitted onto the retina.
This is made of rods and cones, and is connected to the optic nerves that
will transmit the images the eye sees to the brain so they can be
interpreted.
|
Ciliary
Body
|
Ciliary body is a ring-shaped tissue which holds and
controls the movement of the eye lens, and thus, it helps to control the
shape of the lens.
|
Choroid
|
The choroid lies between the retina and the sclera,
which provides blood supply to the eye, to gives nutrition
|
Vitreous
Humour
|
The vitreous humour is the gel located in the back
of the eye which helps it hold its shape.
|
Aqueous
Humour
|
The aqueous humour is a watery substance that fills
the eye which allows the eye to maintain its shape. If a patient's aqueous
humour is not draining properly, they can develop glaucoma.
|
Fovea
|
an indentation in the centre of the retina. This
small part of our retina is responsible for our
highest visual acuity
|
suspensory
ligament
|
the ring of tissue which holds the lens in place
|
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