Density of cells in adult corneal endothelium ?
**Core Concept**
The adult corneal endothelium is a single layer of cells that lines the posterior surface of the cornea, playing a crucial role in maintaining corneal transparency by regulating fluid and electrolyte balance. The density of cells in the adult corneal endothelium is an essential aspect of corneal health and function.
**Why the Correct Answer is Right**
The density of cells in the adult corneal endothelium is relatively constant and ranges from 2500 to 3500 cells per square millimeter. This high cell density is critical for maintaining the cornea's transparency and preventing edema. The endothelial cells are tightly packed, with a uniform distribution, allowing for efficient regulation of fluid and electrolyte transport across the corneal endothelial layer. The tight junctions between endothelial cells also contribute to the maintenance of corneal transparency.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not provide a specific range of cell density, making it an unreliable answer.
**Option B:** This option is incorrect because it suggests a lower cell density than what is actually observed in the adult corneal endothelium.
**Option C:** This option is incorrect because it suggests a significantly higher cell density than what is typically observed in the adult corneal endothelium.
**Clinical Pearl / High-Yield Fact**
A decrease in endothelial cell density, often due to aging, trauma, or disease, can lead to corneal edema and vision loss. Regular monitoring of endothelial cell density is essential for diagnosing and managing endothelial disorders.
**Correct Answer: C. 3000 cells/mm².**