When we move from dark to light, we fail to see for some time but soon the visibility become normal. It is

Options

A. Accommodation
B. Adaptation
C. Mutation
D. Photoperiodism.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question describes a situation where a person transitions from a dark environment to a bright one and experiences temporary difficulty in seeing. This phenomenon is related to how our eyes adjust to different light levels.

2. **Identifying Key Terms**: The options provided are accommodation, adaptation, mutation, and photoperiodism. We need to determine which of these terms best describes the ability of the eye to adjust to changes in light intensity.

3. **Defining the Options**:
- **Mutation**: This refers to a change in the DNA sequence and is not relevant to the question.
- **Photoperiodism**: This is a plant response to the length of light and dark periods, which does not apply to the eye's response to light.
- **Accommodation**: This is the ability of the eye lens to change its shape to focus on objects at different distances. While important for vision, it does not specifically address the adjustment to light intensity.
- **Adaptation**: This refers to the eye's ability to adjust to different levels of light intensity. It involves the activation of different photoreceptors in the retina (rods for low light and cones for bright light).

4. **Conclusion**: Since the question refers to the temporary inability to see when moving from dark to light, the correct term that describes this adjustment process is **adaptation**.

5. **Final Answer**: The correct answer is **adaptation**.

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