Table 1. Clinical observations of the investigated subjects.

Clinical characteristics	N (range)	Percentage (%)
SCC patients	74
Age (years)	4.6 (0–11)
Male	39	52.7
Female	35	47.3
Double eye	44	59.5
Single eye	30	40.5
TC patients (control)	20
Age (years)	6.9 (3–11)
Male	13	65
Female	7	35
Double eye	0	0
Single eye	20	100