Which central thickness tends to drop inferiorly on the cornea?

• A. Thin CT
• B. Thick CT
• C. CT has no effect on inferior drop
• D. Depends on the material

Answer: (B)

When the cornea is viewed as a curved shell under internal eye pressure, how thickness varies across the surface changes how the shell deforms. A central region that is thicker adds more mass at the top of the dome, and in the upright position gravity and the pressure load interact with this heavier center. That combination tends to tilt the surface so the center sits a bit lower relative to the surrounding areas, producing an inferior drop of the apex on the cornea. A thinner center would contribute less of this downward tendency, and saying there’s no effect or that it depends on material doesn’t align with the idea that central thickness alone can influence this downward sag.