Myopia occurs due to

Options

A. Increase in the focal length of eye lens
B. Decrease in the distance between retina and lens
C. Decrease in focal length of eye lens
D. Increase in the distance between retina and lens

Answer

### Step-by-Step Solution

1. **Understanding Myopia**: Myopia, also known as nearsightedness, is a vision condition where distant objects appear blurry while nearby objects can be seen clearly.

2. **Eye Anatomy**: In the eye, light passes through the lens and is focused on the retina. The retina is the light-sensitive layer at the back of the eye that receives the image.

3. **Image Formation in Myopia**: In a normal eye, light rays from a distant object should converge precisely on the retina. However, in myopia, the image is formed in front of the retina instead of directly on it.

4. **Cause of Myopia**: The primary reason for this misalignment is that the eye's lens has a focal length that is too short. This means that the lens bends the light rays too much, causing them to converge before reaching the retina.

5. **Conclusion**: Therefore, myopia occurs due to a decrease in the focal length of the eye lens, which results in images of distant objects being focused in front of the retina.

### Final Answer
Myopia occurs due to a decrease in the focal length of the eye lens.

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