13 有關春季角結膜炎（vernal keratoconjunctivitis）的病徵，何者最具有診斷上的意義？

輪部濾泡（limbal follicle）和Herbert’s pit 巨型乳頭狀突起（giant papilla）

結膜結石（lithiasis） 好發於中年人

B

The term "Vernal keratoconjunctivitis" (VKC) is used to refer to keratoconjunctivitis occurring in spring, and is usually considered to be due to allergens.

VKC is thought to be an allergic disorder in which IgE mediated mechanism play a role. Such patients often give family history of other atopic diseases such ashay fever, asthma or eczema and their peripheral blood shows eosinophilia and increased serum IgE levels.

Predisposing factors

• Age & sex- 4-20 years; more common in boys than girls.
• Season- More common in summer. Hence the name Spring catarrh is a misnomer. Recently it is being labelled as Warm weather conjunctivitis.
• Climate- More prevalent in the tropics.