Human eye ball consists of three layers and it encloses

Options

A. Lens, iris, optic nerve
B. Lens, aquous humor and vitreous humor
C. Cornea, lens, iris
D. Cornea, lens, optic nerve

Answer

To answer the question "Human eyeball consists of three layers and it encloses which of the following?", we will break down the structure of the human eye and identify what is enclosed within these layers.

### Step-by-Step Solution:

1. **Identify the Layers of the Eyeball**:
- The human eyeball consists of three layers:
- **Outer Layer**: Fibrous layer, which includes the sclera and cornea.
- **Middle Layer**: Vascular pigmented layer, also known as the uvea, which includes the choroid, ciliary body, and iris.
- **Inner Layer**: Nervous layer, known as the retina.

2. **Describe Each Layer**:
- **Sclera**: This is the opaque part that covers the posterior 5/6 of the eyeball.
- **Cornea**: This is the transparent part that covers the anterior 1/6 of the eyeball.
- **Choroid**: This is a vascular layer that provides nourishment to the eye.
- **Ciliary Body**: This structure is involved in the accommodation of the lens.
- **Iris**: This is the colored part of the eye that controls the size of the pupil.
- **Retina**: This is the innermost layer that contains photoreceptor cells for vision.

3. **Identify What is Enclosed by These Layers**:
- The three layers of the eyeball enclose:
- **Lens**: The transparent structure that helps focus light onto the retina.
- **Aqueous Humor**: The fluid in the anterior chamber of the eye, between the cornea and lens.
- **Vitreous Humor**: The gel-like substance that fills the space between the lens and the retina.

4. **Conclusion**:
- Therefore, the human eyeball consists of three layers (sclera, choroid, retina) and encloses the lens, aqueous humor, and vitreous humor. The correct answer to the question is that these layers enclose the lens, aqueous humor, and vitreous humor.