Dri-I Schirmer Strips – Eye Moisture Testing

Schirmer Dri-I Ophthalmic Test Strips are sterile, individually packaged diagnostic tools used to measure tear production in dogs, cats, and other animals. These standardized strips provide an accurate assessment of basal and reflex tear production, aiding in the diagnosis of keratoconjunctivitis sicca (KCS), also known as dry eye. Each strip is marked for easy reading in millimeters and is made from non-reactive, high-quality filter paper to ensure consistent absorption and reproducible results. Schirmer Dri-I strips are a staple in veterinary ophthalmology for routine eye exams, preoperative evaluations, and monitoring of ocular health.

Benefits:

• Accurate Tear Production Measurement – Essential for diagnosing dry eye (KCS) and monitoring ocular moisture levels.
• Marked for Easy Reading – Millimeter-scale markings allow precise, visual interpretation in under 60 seconds.
• Sterile & Individually Wrapped – Reduces risk of contamination; ideal for use in clinical settings.
• Non-Invasive Testing Method – Causes minimal discomfort and is safe for routine diagnostic use.
• Veterinary-Trusted – Widely used by ophthalmologists and general veterinary practitioners alike.

How is a Schirmer tear test performed?

Insert the folded end of the strip into the lower conjunctival sac of the eye for 60 seconds. The length of the moistened strip (in mm) indicates the level of tear production.

What tear measurement indicates dry eye in dogs or cats?

Generally, a reading below 10 mm of moisture in 60 seconds may suggest insufficient tear production or KCS, but thresholds can vary by species and clinical context.

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FAQ

What are Schirmer Dri-I Ophthalmic Test Strips used for?

They are diagnostic strips used to measure tear production in dogs, cats, and other animals to help diagnose dry eye (keratoconjunctivitis sicca or KCS).

How do the strips work?

Each strip is placed inside the lower eyelid, where it absorbs tears over a set time, typically 60 seconds. The length of the moistened area indicates tear volume.

What conditions do these strips help diagnose?

They are primarily used to identify tear deficiencies associated with dry eye syndrome and to monitor treatment effectiveness for ocular conditions involving tear production.

Are the strips sterile?

Yes, each strip is individually wrapped and sterile until opened, ensuring safe application without risk of infection.

How are the strips used?

One strip is folded and placed into the lower conjunctival sac of each eye without anesthesia. After 60 seconds, the wet portion is measured in millimeters to assess tear production.

What is considered a normal tear production value?

In dogs, ≥15 mm of wetting in 60 seconds is considered normal. Values between 10–14 mm suggest early or mild dry eye, while ‹10 mm indicate significant tear deficiency. Feline values are generally lower.