Table 1. Characteristic Symptoms and Treatment Options for Allergic Conjunctivitis.

Allergic Condition	Cell Types Involved	Clinical Symptoms	Drugs for the Treatment
Seasonal Allergic Conjunctivitis (SAC) and Perennial Allergic Conjunctivitis (PAC)	Eosinophil and mast cells are major inflammatory mediators	Itching, redness, inflammation and tarsal papillae	Antihistaminic, NSAIDs and mast cell stabilizers
Vernal Keratoconjunctivitis (VKC)	Lymphocytes, eosinophil and mast cells	Severe symptoms such as persistent itching, corneal ulceration and cobblestone papillae	Immunomodulators, corticosteroids, NSAIDs, antihistaminic and mast cell stabilizers
Atopic Keratoconjunctivitis (AKC)	Lymphocytes, basophils, eosinophil and mast cells	Conjunctival damage, severe ocular itching and cataract	Antihistaminic and mast cell stabilizers, NSAIDs. In severe cases Immunomodulators and corticosteroids
Giant Papillary Conjunctivitis (GPC)	Mast cells and lymphocytes	Formation of giant papillae and mild ocular irritation due to contact lens	Mast cell stabilizers, Antihistaminic and NSAIDs
Contact Dermatitis	Lymphocytes and dendritic cells	Erythema and mild ocular itching	Antihistaminic, NSAIDs and mast cell stabilizers