In Fuchs dystrophy, which corneal layer is implicated in causing impaired exchange between the cornea and the rest of the eye?

In Fuchs dystrophy, which corneal layer is implicated in causing impaired exchange between the cornea and the rest of the eye?

• A. Corneal epithelium
• B. Stroma
• C. Endothelium
• D. Descemet's membrane

Answer: (D)

Fuchs dystrophy disrupts the posterior cornea where the corneal endothelium sits on and interacts with Descemet's membrane. The disease causes endothelial cell loss and thickening of Descemet's membrane with guttae. This changes the endothelial-Descemet interface and undermines the endothelium’s ability to pump fluid out of the cornea, leading to impaired exchange of fluids and solutes with the aqueous humor. Descemet's membrane thus becomes a key site of the structural changes that reflect and contribute to the impaired barrier and pump function, making it the layer most associated with the disruption seen in this condition.

Fuchs dystrophy disrupts the posterior cornea where the corneal endothelium sits on and interacts with Descemet's membrane. The disease causes endothelial cell loss and thickening of Descemet's membrane with guttae. This changes the endothelial-Descemet interface and undermines the endothelium’s ability to pump fluid out of the cornea, leading to impaired exchange of fluids and solutes with the aqueous humor. Descemet's membrane thus becomes a key site of the structural changes that reflect and contribute to the impaired barrier and pump function, making it the layer most associated with the disruption seen in this condition.