Which zone is where giant papillary conjunctivitis starts?

Which zone is where giant papillary conjunctivitis starts?

• A. Zone 3
• B. Zone 1
• C. Zone 4
• D. Zone 2

Answer: (B)

Giant papillary conjunctivitis begins where the lid-lens interaction causes the most irritation and antigen exposure. The upper palpebral conjunctiva—the inner surface of the upper eyelid where the contact lens edge rubs with blinking—is the area of greatest mechanical friction and allergen contact. In the zonal scheme used for soft contact lens complications, this region corresponds to Zone 1. Because this is the first site subjected to persistent irritation, the initial papillary changes erupt there. If irritation continues, the inflammatory process can extend to other zones, but the starting point is Zone 1.

Giant papillary conjunctivitis begins where the lid-lens interaction causes the most irritation and antigen exposure. The upper palpebral conjunctiva—the inner surface of the upper eyelid where the contact lens edge rubs with blinking—is the area of greatest mechanical friction and allergen contact. In the zonal scheme used for soft contact lens complications, this region corresponds to Zone 1. Because this is the first site subjected to persistent irritation, the initial papillary changes erupt there. If irritation continues, the inflammatory process can extend to other zones, but the starting point is Zone 1.