In the following abnormalities of the eye which one is a serious condition that leads to blindness ?

Options

A. (a) Myopia
B. (b) Glaucoma
C. (c) Presbyopia
D. (d) Astigmatism

Answer

To determine which eye abnormality is a serious condition that can lead to blindness, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Myopia**:
- Myopia, or nearsightedness, is a condition where nearby objects are seen clearly, but distant objects appear blurry.
- In myopia, the image is formed in front of the retina.
- **Conclusion**: Myopia does not lead to blindness; it can be corrected with glasses or contact lenses.

2. **Understanding Glaucoma**:
- Glaucoma is a serious condition that damages the optic nerve, often due to increased pressure in the eye.
- The optic nerve is crucial for transmitting visual information from the retina to the brain.
- If left untreated, glaucoma can lead to permanent vision loss and blindness, especially in individuals over the age of 60.
- **Conclusion**: Glaucoma is a serious condition that can lead to blindness.

3. **Understanding Presbyopia**:
- Presbyopia is an age-related condition where the ability to focus on close objects diminishes.
- This condition is common in older adults but does not lead to blindness.
- **Conclusion**: Presbyopia does not cause blindness; it can be managed with reading glasses.

4. **Understanding Astigmatism**:
- Astigmatism is a refractive error caused by an irregularly shaped cornea or lens, leading to distorted vision.
- It can be corrected with glasses or contact lenses.
- **Conclusion**: Astigmatism does not lead to blindness; it can be corrected easily.

5. **Final Conclusion**:
- Among the options analyzed, **glaucoma** is the only condition that is serious and can lead to blindness if not treated properly. Therefore, the correct answer is **B. Glaucoma**.