Table 1. Demographic data.

	Mild to moderate	Severe	Total
Gender
Female	4	2	6
Male	2	0	2
Age, mean (range) (in years)	70.33 (65–82)	54 (44–64)	66.25 (44–82)
Diagnosis (number)	Aqueous tear deficiency (6)	Sjögren's syndrome (2)	Sjögren's syndrome (2) Aqueous tear deficiency (6)