Schwable’s ring is seen in which layer of cornea-
**Core Concept**
The cornea is composed of several layers, each with distinct characteristics and functions. **Descemet's membrane** and **Bowman's layer** are two such layers, playing crucial roles in the structure and transparency of the cornea. Understanding the specific features of these layers is essential for identifying where Schwabe's line or ring is located.
**Why the Correct Answer is Right**
Schwabe's line is associated with the termination of **Descemet's membrane**, which is a thin, strong membrane in the cornea. It is located between the **stroma** and the **endothelium** of the cornea. The ring is essentially the edge of Descemet's membrane as it ends near the corneoscleral junction, making it a significant anatomical landmark in ophthalmology.
**Why Each Wrong Option is Incorrect**
**Option A:** This choice is incorrect because it does not accurately represent the location of Schwabe's line in relation to the corneal layers.
**Option B:** Similarly, this option is incorrect as it misidentifies the layer associated with Schwabe's line.
**Option D:** This option is also incorrect, failing to correctly pinpoint the location of Schwabe's line within the corneal structure.
**Clinical Pearl / High-Yield Fact**
Schwabe's line is an important anatomical feature, especially in ophthalmological examinations and surgeries. Recognizing its location can help in understanding corneal pathologies and in planning surgical interventions, particularly those involving the cornea.
**Correct Answer:** D. Descemet's membrane