Which term describes the technique used to view the corneal endothelium using specular reflection with a slit lamp?

• A. Specular Reflection
• B. Pupil
• C. Puncta
• D. Pterygium

Answer: (A)

Viewing the corneal endothelium with a slit lamp uses specular reflection—a mirror-like image produced when light reflects off the smooth, orderly endothelial surface. By angling the slit-lamp light just right, the reflected light returns into the observer’s eye, creating a clear image of the endothelial cell pattern. This technique, often called specular reflection or specular microscopy, lets clinicians assess endothelial cell density, size, and shape, which are important for gauging endothelial health after surgery or in certain diseases. The other terms listed refer to unrelated parts or conditions—the pupil is the iris opening that controls light entry, puncta are tear drainage openings, and pterygium is a conjunctival growth—so they don’t describe this viewing method.