Schirmer’s test
This test was done to assess the speed of tear production. After 2 min of using topical anesthetic eye drops (0.4% benoxinate hydrochloride; Benox; Eipico, made in Egypt), the test was initiated. The test was conducted by the placement of Whatman’s no. 41 filter paper strips (5-mm width × 35-mm length) in the inferior conjunctival fornix (the filter paper was placed at the junction of the lateral 