## **Core Concept**
The lens in the eye is composed of transparent, flexible tissue that changes shape to focus light on the retina. Lens sutures are a key feature in the development and structure of the lens, related to the arrangement of lens fibers. The formation of lens sutures is closely tied to the embryonic development of the lens.

## **Why the Correct Answer is Right**
The correct answer, **C. Embryonic life**, is right because lens sutures begin to form during embryonic development. The lens fibers in the embryonic lens are arranged in a specific pattern, and as the lens grows, these fibers are added in layers. The junctions where these lens fibers meet and interlock form the lens sutures. This process starts early in embryonic life and continues into fetal development.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because lens sutures are not a feature of adult lens structure in the sense that they are formed; rather, they are present and become more complex as the lens grows.
- **Option B:** This option is incorrect because, although the lens continues to grow throughout life, the formation of lens sutures is a developmental process that occurs before birth.
- **Option D:** This option is incorrect because it implies a timeframe (childhood) that is too late for the initial formation of lens sutures.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the arrangement of lens sutures can provide clues about the developmental history of the lens and can be affected in certain congenital conditions. For example, the presence of abnormal lens sutures or their absence can be associated with specific genetic syndromes.

## **Correct Answer:** C. Embryonic life