The cornea is very important component of the human eye. The main function of it is to

Options

A. Change the shape of the lens to enable the image to be focused on the retina
B. Provide structural support to the eye
C. Absorb the `O_(2)` from atmosphere
D. Refract the light towards the retina, helps in maximum focussing

Answer

**Step-by-Step Solution:**

1. **Understanding the Cornea**: The cornea is the transparent outermost layer of the human eye. It is located at the front part of the eye and covers the iris, pupil, and anterior chamber.

2. **Identifying the Functions of the Cornea**: The main function of the cornea is to refract light. Refraction is the bending of light as it passes through the cornea, which helps focus the light onto the retina.

3. **Importance of Refraction**: When light enters the eye, it first passes through the cornea. If the cornea did not refract the light properly, the light would disperse, leading to a blurred image. Therefore, the cornea plays a crucial role in ensuring that the light is focused correctly on the retina.

4. **Evaluating the Options**:
- **Option A**: "Change the shape of the lens to enable the image to be focused on the retina" - This is incorrect as it is the ciliary body and suspensory ligaments that change the shape of the lens.
- **Option B**: "Provide structural support to the eye" - This is also incorrect; structural support is provided by other parts of the eye.
- **Option C**: "Absorb oxygen from the atmosphere" - While the cornea does absorb oxygen, this is not its main function.
- **Option D**: "Refract the light towards the retina helping maximum focusing" - This is the correct answer as it describes the primary function of the cornea.

5. **Conclusion**: The main function of the cornea is to refract light towards the retina, which aids in maximum focusing of the image.

**Final Answer**: The main function of the cornea is to refract the light towards the retina, helping maximum focusing.

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