about eye and its parts
Answers
Answered by
1
eye a round, liquid-filled sphere that allows us to see? Well, essentially yes, but it is much more complicated than that. There are many parts that must work together to allow mammals to see. There are two regions of the eye: the front and the back. We'll discuss the front of the eye first.
The Front of the Eye
The front part of the eye is what you see if you stand in front of a mirror. It consists of the:
IrisPupilCorneaScleraConjunctiva
What you see when you look in the mirror.
The iris is the colored part of the eye. It is important because it controls the size of the pupil. The pupil is the dark circle inside the center of the eye. The dark hole is altered in shape by the iris, affecting the amount of light that is let into the eye. The pupil is large when light is low or it is dark outside and tiny when it is very sunny or bright.
The cornea is the clear covering over the pupil and iris. This is the reason that contacts are dome shaped because they sit on the cornea. The cornea provides 66% of the optic power that the overall eye has. This means that the cornea is very important in focusing what we see by bending light.
The sclera is the white part of the eye that we see in the mirror that becomes pink or red when we are tired or have sneezed so hard that our eyes become bloodshot. This eye part is the protective, outer layer of the eye. It is made up of elastic-like fibers called elastin and collagen, a common connective tissue found in mammals.
The eyeball is held in place by the eyelid, which is the first protective layer. The eyelid has an inner layer of skin called conjunctiva. The conjunctiva covers the sclera and provides mucus and tears for eye lubrication and bacterial infection prevention. It does not cover the cornea.

The Back of the Eye
In the back of the eye, are the important items that we cannot see when we look in the mirror. This area consists of the:
LensVitreousRetinaMaculaFoveaOptic nerve
These parts have important independent functions. The lens of the eye works in conjunction with the cornea. This part is also important for light refraction and focusing of images onto the retina. The lens can change shape to fine tune focus, change focal distance, and create a sharp image.
The vitreous is the clear, thick gel-like substance between the lens and retina. The function of the vitreous gel is to help with optical power, maintain eye structure and retinal health. It is very clear, 98% water, and doesn't change from birth, unlike many fluids in the body that are replenished throughout life.
To unlock this lesson you must be a Study.com Member.
Create your account
Register to view this lesson
Are you a student or a teacher?
I am a student I am a teacher
Parts of the Eye and their Functions Related Study Materials
Related
Recently Updated
Popular
Explore Subjects
Create an account to start this course today
Try it risk-free for 30 days!
Create An Account
Like this lessonShare
Explore our library of over 70,000 lessons
Search
Browse
Browse by subject
×
The Front of the Eye
The front part of the eye is what you see if you stand in front of a mirror. It consists of the:
IrisPupilCorneaScleraConjunctiva
What you see when you look in the mirror.
The iris is the colored part of the eye. It is important because it controls the size of the pupil. The pupil is the dark circle inside the center of the eye. The dark hole is altered in shape by the iris, affecting the amount of light that is let into the eye. The pupil is large when light is low or it is dark outside and tiny when it is very sunny or bright.
The cornea is the clear covering over the pupil and iris. This is the reason that contacts are dome shaped because they sit on the cornea. The cornea provides 66% of the optic power that the overall eye has. This means that the cornea is very important in focusing what we see by bending light.
The sclera is the white part of the eye that we see in the mirror that becomes pink or red when we are tired or have sneezed so hard that our eyes become bloodshot. This eye part is the protective, outer layer of the eye. It is made up of elastic-like fibers called elastin and collagen, a common connective tissue found in mammals.
The eyeball is held in place by the eyelid, which is the first protective layer. The eyelid has an inner layer of skin called conjunctiva. The conjunctiva covers the sclera and provides mucus and tears for eye lubrication and bacterial infection prevention. It does not cover the cornea.

The Back of the Eye
In the back of the eye, are the important items that we cannot see when we look in the mirror. This area consists of the:
LensVitreousRetinaMaculaFoveaOptic nerve
These parts have important independent functions. The lens of the eye works in conjunction with the cornea. This part is also important for light refraction and focusing of images onto the retina. The lens can change shape to fine tune focus, change focal distance, and create a sharp image.
The vitreous is the clear, thick gel-like substance between the lens and retina. The function of the vitreous gel is to help with optical power, maintain eye structure and retinal health. It is very clear, 98% water, and doesn't change from birth, unlike many fluids in the body that are replenished throughout life.
To unlock this lesson you must be a Study.com Member.
Create your account
Register to view this lesson
Are you a student or a teacher?
I am a student I am a teacher
Parts of the Eye and their Functions Related Study Materials
Related
Recently Updated
Popular
Explore Subjects
Create an account to start this course today
Try it risk-free for 30 days!
Create An Account
Like this lessonShare
Explore our library of over 70,000 lessons
Search
Browse
Browse by subject
×
Answered by
1
eye, conjuctiva,cornea,aqueous humour, pupil, Celera,choroid,retina,vitreous humour, ciliary body are it's parts . eye is the organ which enables us to see every thing around us
Similar questions
Math,
7 months ago
Hindi,
7 months ago
Accountancy,
7 months ago
Math,
1 year ago
History,
1 year ago