Which statement best describes EBMD?

Which statement best describes EBMD?

• A. The top layer of the cornea does not adhere well to the bottom layers
• B. EBMD stands for epithelial basement membrane dystrophy
• C. It is caused by bacterial infection
• D. It is always asymptomatic

Answer: (A)

EBMD is a disorder of the corneal surface where the epithelial basement membrane is abnormal, so the surface epithelium does not attach well to the underlying Bowman's layer and stroma. This faulty adhesion leads to irregular epithelial basement membrane, which can cause the epithelium to detach and erode, producing recurrent erosions, fluctuating vision, and surface irregularity. The hallmark patterns seen on the cornea—map-like, dot, and fingerprint appearances—reflect this irregular basement membrane. While the acronym EBMD stands for epithelial basement membrane dystrophy (true), that naming describes the membrane abnormality rather than the clinical consequence. EBMD is not caused by bacterial infection, and it is not universally asymptomatic—patients can have symptomatic erosions and vision changes.

EBMD is a disorder of the corneal surface where the epithelial basement membrane is abnormal, so the surface epithelium does not attach well to the underlying Bowman's layer and stroma. This faulty adhesion leads to irregular epithelial basement membrane, which can cause the epithelium to detach and erode, producing recurrent erosions, fluctuating vision, and surface irregularity. The hallmark patterns seen on the cornea—map-like, dot, and fingerprint appearances—reflect this irregular basement membrane.

While the acronym EBMD stands for epithelial basement membrane dystrophy (true), that naming describes the membrane abnormality rather than the clinical consequence. EBMD is not caused by bacterial infection, and it is not universally asymptomatic—patients can have symptomatic erosions and vision changes.