What are the important features of visual system of a person ?

Explanation

### Step-by-Step Text Solution

1. **Definition of the Visual System**: The visual system of a person comprises the eyes and the nervous system that connects the eyes to the brain. This system enables us to perceive and interpret visual information from our surroundings.

2. **Key Components of the Eye**:
- **Cornea**: The transparent front part of the eye that allows light to enter. It plays a crucial role in focusing light.
- **Pupil**: The small opening in the center of the eye that lets light in. Its size is adjustable based on the amount of light available.
- **Iris**: The colored part of the eye that surrounds the pupil. It controls the size of the pupil and thus regulates the amount of light entering the eye.
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