What are the functions of human eye ? explain all parts.
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The iris of the eye functions like thediaphragm of a camera, controlling the amount of light reaching the back of the eye by automatically adjusting the size of the pupil (aperture). The eye's crystalline lens is located directly behind the pupil and further focuses light.
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Eyes are animal organs that are specialized for sight. These may be as simple as proteins or cells which can tell light from darkness – like the “eyes” found in many microorganisms – or they may be complex assemblies of lenses, filters, light-sensitive tissues, nerves, and support structures.
Parts of eye-
The Conjunctiva
The surface of the eye and of the inner eyelids is covered by a clear, protective membrane called the “conjunctiva.”
The Sclera
The sclera is also known as the “white of the eye.” It is – as you may have guessed – the white part of the eye that surrounds the iris and pupil.
The Cornea
Light starts its journey into the eye by passing through the cornea. This layer of transparent tissue sits on top of the iris and pupil. It helps to focus light to produce a clear image on the retina, and acts as an additional protective layer for the eye.
Iris
The iris is the colored ring around the pupil. Different people have different amounts of pigment in their iris, resulting in eye colors ranging from blacks to very pale blues and greens.
Pupil
The pupil is the opening to the inner chamber of the eye. Pupils appear black because light passes through them and does not return. The pupil, then, is our actual “window to the world.”
Lens
The lens of the eye lies immediately behind the pupil. Some people think that the lens of the eye is found on the outside, where the cornea is – perhaps because of the use of the word “contact lenses.” But the lens that performs the final focusing of light is found inside the eye, behind the pupil.
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Eyes are animal organs that are specialized for sight. These may be as simple as proteins or cells which can tell light from darkness – like the “eyes” found in many microorganisms – or they may be complex assemblies of lenses, filters, light-sensitive tissues, nerves, and support structures.
Parts of eye-
The Conjunctiva
The surface of the eye and of the inner eyelids is covered by a clear, protective membrane called the “conjunctiva.”
The Sclera
The sclera is also known as the “white of the eye.” It is – as you may have guessed – the white part of the eye that surrounds the iris and pupil.
The Cornea
Light starts its journey into the eye by passing through the cornea. This layer of transparent tissue sits on top of the iris and pupil. It helps to focus light to produce a clear image on the retina, and acts as an additional protective layer for the eye.
Iris
The iris is the colored ring around the pupil. Different people have different amounts of pigment in their iris, resulting in eye colors ranging from blacks to very pale blues and greens.
Pupil
The pupil is the opening to the inner chamber of the eye. Pupils appear black because light passes through them and does not return. The pupil, then, is our actual “window to the world.”
Lens
The lens of the eye lies immediately behind the pupil. Some people think that the lens of the eye is found on the outside, where the cornea is – perhaps because of the use of the word “contact lenses.” But the lens that performs the final focusing of light is found inside the eye, behind the pupil.
Thanks
♥❤❤
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