A student is asked to sit at the last bench because he cannot read the letters written on blackboard clearly from front seat but still is unable to read the letters written in his textbook. Which of the following statements is correct?

Options

A. The near point has come closer to him
B. The far point has come closer to him
C. The near point has receded away
D. The far point has receded away

Explanation

To solve the problem, we need to analyze the situation described in the question. The student has difficulty reading both the blackboard and the textbook, which suggests a specific type of vision problem. Let's break down the solution step by step.

### Step-by-Step Solution:

1. **Identify the Symptoms**: The student cannot read letters on the blackboard from the front seat and also struggles to read from his textbook. This indicates a problem with vision at both near and far distances.

2. **Understand Vision Defects**: The inability to see distant objects clearly is known as myopia (nearsightedness), while difficulty in seeing close objects clearly is known as hypermetropia (farsightedness). In this case, since the student has trouble reading both far (blackboard) and near (textbook), we need to consider the implications of both conditions.

3. **Determine the Likely Condition**: Given that the student is able to see distant objects (like the blackboard) when sitting at the last bench but still cannot read his textbook, it suggests that he may be suffering from hypermetropia. In hypermetropia, the near point (the closest point at which objects can be seen clearly) is farther away than normal.

4. **Conclusion**: The correct statement regarding the student's condition is that the near point has receded away. This means that the student has difficulty seeing objects that are close to him, which is characteristic of hypermetropia.

5. **Corrective Measures**: To correct hypermetropia, convex lenses are used, which help to bring the near point closer to the eye, allowing the student to read clearly.

### Final Answer:
The correct statement is that the near point has receded away, indicating hypermetropia.

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