WHAT IS SCHIRMER TEARING EYE TEST?
The Schirmer test differentiates “keratoconjunctivitis sicca” from the abnormal or reduced tearing of the eyes. In normal eyes, both basic and reflex tearing keep the eyes moist. Basic tearing occurs throughout the day, supplying basic essential nutrients and lubricants to the eyes, and reflex tearing occurs in response to eye irritation. Either or both types of tearing capability may be absent or reduced in different disorders and lead to ocular surface damage. The Schirmer tearing eye test involves the simultaneous testing of the tearing ability of both eyes to assess the function of the lacrimal glands. The amount of moisture accumulating on filter paper held against the conjunctival sac is evaluated. Filter paper that remains dry for 15 minutes indicates insufficient tear formation.