In myopia or short sightedness

Options

A. Image is formed slightly in front of retina because eye ball is longer
B. Eye ball is normal but image is formed over blind spot
C. Eye ball is n ormal but images is formed slightly behind the retina due to faulty lens
D. Courvature of cornes becomes irregular.

Answer

**Step-by-Step Solution:**

1. **Understanding Myopia**: Myopia, commonly known as short-sightedness, is a vision condition where close objects appear clear, but distant objects are blurry. This occurs when the eyeball is longer than normal or the lens is too curved.

2. **Image Formation in Myopia**: In myopia, the light rays entering the eye are focused in front of the retina rather than directly on it. This happens because the eyeball is elongated, causing the focal point of the light rays to fall short of the retina.

3. **Analyzing the Options**:
- **Option 1**: "Image formed slightly in front of the retina because eyeball is longer." - This is correct because it describes the condition accurately.
- **Option 2**: "Eyeball is normal but image is formed of a blank spot." - This is incorrect; myopia involves an elongated eyeball.
- **Option 3**: "Eyeball is normal but image is formed slightly behind the retina due to the faulty lens." - This describes hyperopia (farsightedness), not myopia.
- **Option 4**: "Curvature of the cornea becomes irregular." - This can lead to astigmatism, not myopia.

4. **Conclusion**: The correct answer is that in myopia, the image is formed slightly in front of the retina due to the elongation of the eyeball. Therefore, the correct option is **Option 1**.

5. **Correction of Myopia**: Myopia can be corrected using concave lenses, which diverge light rays so that they focus on the retina instead of in front of it.