Classification SAC and PAC Both seasonal<unk>  (SAC) and perennial<unk>  (PAC) are two<unk> ute<unk>  conjunctival disorders. SAC is the most common ocular allergy. Symptoms of the aforementioned ocular diseases include itching and pink to reddish eye(s). These two eye conditions are mediated by mast cells. Nonspecific measures to ameliorate symptoms include cold compresses, eyewashes with tear substitutes, and avoidance of allergens. Treatment consists of antihistamine, mast cell stabilizers, dual mechanism anti-allergen agents, or topical antihistamines. Corticosteroids are another option, but, considering the side-effects of cataracts and increased intraocular pressure, corticosteroids are reserved for more severe forms of<unk>  such as vernal keratoconjunctivitis (VKC) and atopic keratoconjunctivitis (AKC). VKC and AKC Both vernal keratoconjunctivitis (VKC) and atopic keratoconjunctivitis (AKC) are chronic<unk>  diseases wherein eosinophils, conjunctival fibroblasts, epithelial cells, mast cells, and TH2 lymphocytes aggravate the biochemistry and histology of the conjunctiva. VKC is a disease of childhood and is prevalent in males living in warm climates. AKC is frequently observed in males between the ages of 30 and 50. VKC and AKC can be treated by medications used to combat<unk>  or the use of steroids. Maxwell-Lyons sign, shield ulcer, cobblestones papillae, gelatinous thickening at the limbus, and Horner-Trantas dots are specific features of vernal type. Giant papillary conjunctivitis Giant papillary conjunctivitis is not a true ocular<unk>  reaction and is caused by repeated mechanical irritation of the conjunctiva. Repeated contact with the conjunctival surface caused by the use of contact lenses is associated with GPC. PKC Phlyctenular keratoconjunctiviti (PKC) results from a delayed hypersensitivity/inflammatory reaction to antigens expressed by various pathogens. Common agents include Staph. aureus, Mycobacterium tuberculosis, Chlamydia and Candida.
Allergic conjunctivitis
Actinic conjunctivitis
Ligneous conjunctivitis
Acute hemorrhagic conjunctivitis
Ocular larva migrans
Phlyctenular keratoconjunctivitis
Sympathetic ophthalmia
Adenoviral keratoconjunctivitis