Which area of the body has the thinnest skin?

• A. Eyelids
• B. Palms
• C. Back
• D. Soles

Answer: (A)

Skin thickness varies across the body, with areas that need protection from abrasion building up a thicker outer layer and areas that require fine, delicate movement staying very thin. The eyelids have an exceptionally thin skin layer, with only a minimal epidermis and dermis and little underlying fat. This extreme thinness allows the eyelids to move easily, spread tears smoothly, and heal quickly after minor injuries because the tissue is highly vascular and responsive. In contrast, the palms and soles develop thick skin to resist wear, and the back has relatively thicker skin as well. So the eyelids sit at the thinnest extreme.