The ability of eye to focus on both near and far objects is called

Options

A. Presbyopia
B. Myopia
C. Hypermetropia
D. Power of accommodation

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the ability of the eye to focus on both near and far objects. This is a fundamental concept in optics and physiology of the eye.

2. **Identifying the Concept**: The ability of the eye to adjust its focus for objects at different distances is known as "Accommodation". This process allows the eye to change the shape of the lens to focus light properly on the retina.

3. **Defining Accommodation**: Accommodation involves the ciliary muscles contracting or relaxing to change the curvature of the lens. When focusing on near objects, the lens becomes thicker (more curved), and when focusing on distant objects, it becomes thinner (less curved).

4. **Determining the Correct Option**: The question provides multiple-choice options. The correct answer is "Power of Accommodation", which refers to the range of distances over which the eye can focus.

5. **Eliminating Incorrect Options**:
- Option 1: Presbyopia - This is a condition related to aging where the ability to accommodate decreases, but it is not the term for the ability itself.
- Option 2: Myopia - This is short-sightedness, where distant objects appear blurry, which is not related to the ability to focus on both near and far objects.
- Option 3: Hypermetropia - This is long-sightedness, where nearby objects appear blurry, again not related to the ability to focus properly.

6. **Conclusion**: After analyzing the options, the correct answer is "Power of Accommodation", as it describes the eye's ability to focus on both near and far objects.

**Final Answer**: The ability of the eye to focus on both near and far objects is called "Power of Accommodation".

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