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Conjunctival Conjunctival Redness/Conjunctival Probe (Qualitative Assessment of Conjunctival Appearance)

Published: August 9, 2026Updated: August 16, 2026

This test evaluates the redness or irritation of your conjunctiva—the clear tissue covering the white part of your eye and the inner eyelid.

Quick summary

["A simple check of eye health that may help identify inflammation or infection."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
21188-8
Short code
C trach rRNA Conjunct Ql Probe
Synonyms
C trach rRNA Conjunct Ql Probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

The test involves a gentle probe to assess the conjunctiva’s color and texture. Redness or swelling may indicate conditions like conjunctivitis (pink eye), allergies, or other eye irritations.

How It’s Performed

Your healthcare provider will use a sterile probe to examine your conjunctiva. No blood or invasive procedures are involved—just a quick visual and tactile assessment.

When It’s Ordered

Doctors may recommend this test if you’re experiencing eye redness, itching, discharge, or discomfort. It’s often part of an eye exam or evaluation for eye-related symptoms.

Possible Results

Results are qualitative (descriptive rather than numerical). Normal findings show minimal redness or irritation. Abnormal findings may suggest inflammation, infection, or other issues requiring further evaluation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

Why might this test be important?
This test helps quickly identify eye irritation or infection, guiding next steps like prescribing eye drops, antibiotics, or allergy medications. Early detection can prevent complications.
How long will I wait for results?
Results are typically available immediately during your visit, as it’s a quick, in-person assessment. If further testing is needed, your provider will discuss it with you.
Can I do this test at home?
No, this test must be performed by a healthcare professional in a clinical setting to ensure accuracy and safety.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy