What is the primary characteristic of giant papillary conjunctivitis?

Giant papillary conjunctivitis is primarily characterized by the formation of large papules on the inner surface of the eyelids, particularly the upper eyelid. These papules are an inflammatory response and are often associated with the use of contact lenses or certain types of allergens. The presence of these bumps signifies irritation and inflammation of the conjunctiva due to factors like mechanical irritation from lenses or persistent allergens.

The condition leads to discomfort, redness, and possible visual disturbances due to the inflamed surface. The formation of these papules is crucial for diagnosis and differentiates giant papillary conjunctivitis from other forms of conjunctivitis that may have different underlying causes and presentations. Therefore, recognizing the swelling and development of these small bumps is essential in identifying and addressing the condition effectively.