For Schirmer 1 testing, a normal value in 5 minutes is greater than how many millimeters?

For Schirmer 1 testing, a normal value in 5 minutes is greater than how many millimeters?

• A. > 15 mm
• B. > 5 mm
• C. > 20 mm
• D. > 10 mm

Answer: (D)

Schirmer I test without anesthesia measures total tear production (basal plus reflex) by how far the filter paper wets in the lower fornix over five minutes. A normal result in that 5-minute window is more than 10 mm of wetting. Values between about 5 and 10 mm are considered borderline, and less than 5 mm indicates reduced tear production. Therefore, the best answer is a normal value greater than 10 mm.

Schirmer I test without anesthesia measures total tear production (basal plus reflex) by how far the filter paper wets in the lower fornix over five minutes. A normal result in that 5-minute window is more than 10 mm of wetting. Values between about 5 and 10 mm are considered borderline, and less than 5 mm indicates reduced tear production. Therefore, the best answer is a normal value greater than 10 mm.