Question

Describe the structure of human eye.

Answer 1

Answer:

The main parts of the human eye are the cornea, iris, pupil, aqueous humor, lens, vitreous humor, retina, and optic nerve. Light enters the eye by passing through the transparent cornea and aqueous humor. The iris controls the size of the pupil, which is the opening that allows light to enter the lens.

Answer 2

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Structure of the eye is essential to understand as it one of the important sensory organs in the human body. It is mainly responsible for vision, differentiation of colour (the human eye can differentiate approximately 10 – 12 million colours) and maintaining the biological clock of the human body. The human eye can be compared to a camera as both functions by gathering, focusing, and transmitting the light through the lens for creating an image of an object.

☯ Structure and Functions of the Human Eye :

The human eyes are the most complicated sense organs in the human body. From the muscles and tissues to nerves and blood vessels, every part of the human eye is responsible for a certain action. Furthermore, contrary to popular belief, the eye is not perfectly spherical; instead, it is two separate segments fused together. It is made up of several muscles and tissues that come together to form a roughly spherical structure. From an anatomical perspective, the human eye can be broadly classified into the external structure and internal structure.

☯ The External Structure of an Eye :

The parts of the eye that are visible externally comprise the external structure of the eye.

These include the following :

☯ Sclera :

It is a tough and thick white sheath that protects the inner parts of the eye. We know it as the ‘White of the eye’.

☯ Conjunctiva :

It is a thin transparent membrane that is spread across the sclera. It keeps the eyes moist and clear by secreting small amounts of mucus and tears.

☯ Cornea :

It is the transparent layer of skin that is spread over the pupil and the iris. The main role of the cornea is to refract the light that enters the eyes.

☯ Iris :

It is a pigmented layer of tissues that make up the coloured portion of the eye. Its primary function is to control the size of the pupil, depending on the amount of light entering it.

☯ Pupil :

It is the small opening located in the middle of the Iris. It allows light to come in.

Explanation:

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