Where do conjunctival epithelial flaps often occur?

Where do conjunctival epithelial flaps often occur?

• A. Center of the cornea
• B. Scleral surface
• C. Lid margin
• D. Edge of contact lenses

Answer: (D)

Conjunctival epithelial flaps form when the conjunctival surface is mechanically irritated, causing a patch of epithelium to lift or shear away. The lens edge is the site where the contact lens most directly contacts and moves against the bulbar conjunctiva during blinking, so any sharp or poorly fitting edge can create these epithelium flaps. The center of the cornea involves corneal epithelium, not conjunctival tissue; the scleral surface and lid margin are less commonly involved with this specific trauma pattern. Therefore, the edge of the contact lens is the typical location where conjunctival epithelial flaps occur.

Conjunctival epithelial flaps form when the conjunctival surface is mechanically irritated, causing a patch of epithelium to lift or shear away. The lens edge is the site where the contact lens most directly contacts and moves against the bulbar conjunctiva during blinking, so any sharp or poorly fitting edge can create these epithelium flaps. The center of the cornea involves corneal epithelium, not conjunctival tissue; the scleral surface and lid margin are less commonly involved with this specific trauma pattern. Therefore, the edge of the contact lens is the typical location where conjunctival epithelial flaps occur.