Conjunctival papillary hyperplasia

Conjunctival papillary hyperplasia: It is a large number of conjunctival epithelial cells proliferating, accompanied by local vascular proliferation and inflammatory cell infiltration, resulting in local or conjunctival lesions, which are stippled or spherical in shape. Umbilical neovascularization can be seen in the center of the nipple under the microscope, making the nipple red. Inflammation is severe and delayed, and adjacent nipples can proliferate and form giant nipples with a diameter greater than 1 mm. Nipple hyperplasia is a non-specific change in conjunctiva, which is more common in allergic conjunctivitis, spring catarrhal conjunctivitis, and giant papillary conjunctivitis (response to contact lenses, artificial cornea, and long-term conjunctival foreign bodies), as well as trachoma and chronic conjunctiva inflammation. Conjunctivitis is a common disease in the ophthalmology, but its incidence has not yet been determined. Since most of the conjunctiva is in direct contact with the outside world, it is susceptible to irritation by infectious agents (such as bacteria, viruses, and chlamydia) and non-infectious agents (trauma, chemicals and physical factors) in the surrounding environment. Lymphatic tissue is abundant, and self and external antigens can easily cause sensitization. Conjunctivitis is a collective term for the inflammatory response of conjunctival tissue to the outside world and the body's own factors. Although the impact of conjunctivitis itself on vision is generally not serious, when its inflammation spreads to the cornea or causes complications, it can cause vision damage.