Table 4.

Distribution of the four most common predisposing risk factors in different age subgroups

Age Group	Predisposing Risk Factor	Number of Patients
$<$ 18 years old	Contact lens wear	7
	Trauma	1
	Ocular surface disease	2
	Underlying corneal disease	–
18–40 years old	Contact lens wear	32
	Trauma	6
	Ocular surface disease	1
	Underlying corneal disease	2
$>$ 40 years old	Contact lens wear	20
	Trauma	19
	Ocular surface disease	22
	Underlying corneal disease	30