Phenol Red Thread Tear Test
Type I: 2 threads/pack, 10 packs/box.
Packaging & Usage Instructions:
Each sealed pouch contains dual threads for left and right eye measurement.
A precision millimeter scale is printed on the pouch reverse to quantify tear wetting length.
Product Performance:
The phenol red tear thread exhibits chromatic transition: yellow in acidic solutions (pH <6.8) and red in alkaline solutions (pH >7.2).
Features:
Simple operation
Rapid testing
Reduced irritation compared to tear test strips, no discomfort
Intended Use:
For measuring tear secretion volume.
Contraindications:
Not for use in animals with severe ocular lesions.
Precautions:
Tear open pouch immediately before use; do not use if the pouch shows visible damage.
Each pouch is for single-animal use only; dual threads are designated for left/right eye measurement.
Sterilized by Ethylene Oxide; single-use device.
No anesthesia required during testing. If ocular topical agents are applied, wait 5 minutes before testing.
Repeat testing across multiple dates is recommended for reliability due to potential tear volume variability.
Not recommended for animals with recent topical ocular medication due to potential interference.
Storage:
Store in a dark, dry place at room temperature.
Transportation:
Protect from sunlight and rain during transit.
Shelf Life:
Two years when stored under intact packaging and proper storage conditions.
