17 Parts of Eyes and Functions + Illustrative Drawings
The eye is one of the
sensory systems our body has. This organ serves as the sense of sight. We can
see things, distinguish darkness, distinguish colors, and so on because it is
supported by the role of the eye. As for running this role, the eyes were
supported by some vital parts that have their respective functions. What are
the parts of the eye and its function? To know the answer, see the following
description with the picture!
Parts of the Eyes and Their Functions
There are at least 17
parts of the eye that play an important role in the mechanism of vision.
Seventeen parts of the eye and its function, among others, as shown images of
the following parts of the eye.
Parts of the Eyes and
Their Functions
1. Cornea
The cornea (corneos) is
the eye portion located in the outermost layer. This section is a translucent
(translucent) transparent film. This corneal nature allows light to enter the
light receiving cells inside the eyeball. In addition to protecting the eyes
from foreign objects from the outside, the cornea also serves in refraction in
the lens of the eye.
2. Iris
Iris is part of the eye
that serves to regulate the size of the pupil. It is this part that gives color
to the eyes. For example, Asians have eyes in black to brown, Europeans have
blue to green eyes, and so on.
3. Pupil
Pupil is part of the
eye in the form of a small hole that serves to regulate the amount of light
coming into the eyeball. The size of the pupil is regulated by the iris. When
the light comes too bright, the pupils will shrink. Meanwhile, when the light
comes too dim, pupils will enlarge. The mechanism of action of this pupil to
set eyes in order to receive the right amount of light.
4. Retina
The retina is the eye
part of a thin layer of cells located at the back of the eyeball. This section
serves to capture the shadow that is formed by the lens of the eye and then
change it into a neural signal. The retina is a very light-sensitive eye part because
it has 2 photoreceptor cells, the rods and cones.
Also Read: Ear Parts
and Their Functions
5. Eyepiece
Eye lens is the part of
the eye that serves to form an image. The image of the eyepiece is then
continued for the retina to be received. The eyepiece can be thinned or
thickened according to the distance of the eye with the object it sees. When
the object distance is too close, the eyepiece will thin out, while when the
distance is too far away, the eyepiece will thicken.
6. Muscle accommodation
The mechanism of
thickening and thinning of the eyepiece may result from the lens lens
accommodation function. This muscle works to push and pull the lens of the eye
so that it can thicken and thin.
7. Yellow spots
Yellow spots are the
most sensitive part of the eye to light. When the object shadow falls on this
part of the eye, the object will be very visible, while if the shadow of the
object falls before or after the yellow spots, the object is not visible
(lamur).
8. Blind spots
Blind spot or blind
spot is the part of the eye that is not sensitive to light. If the shadow of
the object falls right into this section, then the object can not be seen by
the eye.
9. Optic nerve
The optic nerve is the
part of the eye that serves to pass on the shadow information of objects
received by the retina to test the brain. It is through this nerve that we can
determine how the shape of an object we see. If the optic nerve is damaged, it
means we can not see the blind alias.
10. Aqueous humor
Aqueous humor is a
fluid that resembles a transparent slimy plasma with a low protein
concentration. Aqueous humor is produced by the cilia of the body and serves as
the supporting structure of the lens.
12. Vitreous humor
Vitreous humor or also
called the vitreous body is a kind of gel that serves to fill the space between
the retina and the lens.
13. Sklera
Sklera is part of the
white wall of the eye. This section has an average thickness of about 1 mm, but
it can also be thickened to 3 mm because of the irregular muscles.
In addition to the 13
parts of the eye and function above, the outside of the eye is also protected
by several organs, including:
Parts of the Eyes and
Their Functions
14. Eyelashes
Eyelashes serve to keep
the eye from the entry of foreign objects of small size such as dust or sand.
15. Eyebrows
Eyebrows retain the
water of perspiration or water that falls from the forehead (forehead) so as
not to enter the eye. Some people shave their eyebrows, but logically shaving
eyebrows is not really good.
16. Eyelids
The eyelids serve to
keep the eyeball from the entry of foreign objects from outside the eyes such
as dust, scratches, sand, or smoke. In addition, this part of the eye also
serves to sweep the eyeball with a liquid and adjust the amount of light coming
into the eye. The functions of the eyelid is supported by the mechanism of open
and close (blinking)by the calyx muscles.
17. lacrima gland
Lacrima gland or tear gland is the eye that serves to produce tears. Tears are
useful to moisturize the eyes, clean the eyes of the dust, and kill the germs
that enter the eyes. Well, so glimpse of our exposure of the parts of the eye
and its function. By understanding the parts of the eye, hopefully we are more
concerned with the health of our eyes. Can see is one of the blessings that God
has given. We should be able to keep this blessing! Regards.
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