Reduction in elastricity of eye lens with age causes

Options

A. Myopia
B. Cataract
C. Presbyopia
D. Astigmatism

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the effects of the reduction in elasticity of the eye lens with age. We need to identify which eye defect is caused by this reduction.

2. **Identifying Eye Defects**: The four eye defects mentioned are:
- Myopia (near-sightedness)
- Cataract
- Presbyopia
- Astigmatism

3. **Analyzing Each Condition**:
- **Myopia**: This condition is characterized by the inability to see distant objects clearly. It occurs when the eyeball is too short, causing images to be focused in front of the retina. This is not related to the elasticity of the lens.
- **Cataract**: In cataracts, the eye lens becomes opaque, leading to decreased visibility. This condition is also not directly related to the elasticity of the lens.
- **Presbyopia**: This condition occurs as people age, specifically after 40 years, and is directly caused by the loss of elasticity of the eye lens. This loss makes it difficult to focus on close objects.
- **Astigmatism**: This defect arises from an imperfection in the curvature of the eye, leading to blurred vision. It is unrelated to the elasticity of the lens.

4. **Conclusion**: Among the four options, presbyopia is the only condition that is caused by the reduction in elasticity of the eye lens with age.

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