Which statement best describes the key structural characteristics of the lens?

Which statement best describes the key structural characteristics of the lens?

• A. Transparent, avascular, and metabolically active
• B. Opaque, avascular, and metabolically active
• C. Transparent, vascular, and metabolically inactive
• D. Opaque, vascular, and metabolically inactive

Answer: (A)

The lens stays transparent while still needing to maintain its internal environment. It is transparent and avascular, meaning there are no blood vessels in the lens to avoid scattering light. At the same time, it remains metabolically active, especially in the anterior epithelium, to support ion balance and protective processes that keep the lens clear. So, the best description is transparent, avascular, and metabolically active. The other statements fail because an opaque lens would blur vision, a vascular lens would obstruct light, and a metabolically inactive lens wouldn’t sustain the conditions needed for long-term transparency.

The lens stays transparent while still needing to maintain its internal environment. It is transparent and avascular, meaning there are no blood vessels in the lens to avoid scattering light. At the same time, it remains metabolically active, especially in the anterior epithelium, to support ion balance and protective processes that keep the lens clear. So, the best description is transparent, avascular, and metabolically active. The other statements fail because an opaque lens would blur vision, a vascular lens would obstruct light, and a metabolically inactive lens wouldn’t sustain the conditions needed for long-term transparency.