Measure of reflex tear production; uses 5 _ 35-mm filter paper strips folded at notched indentation with short end placed over lower eyelid margin. Wetness at 5 minutes (or alternately at 1 minute, with value multiplied by 3) is noted. Also, basic tear production can be measured using previously described procedure after topical anesthesia is applied to cul-de-sac and conjunctiva.