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Corneal Staining Responder Analysis: A Clinically Meaningful Dry Eye Outcome
Esen K Akpek1, John D Sheppard2, Sonja Krösser3
1The Wilmer Eye Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland.
Ophthalmology
|July 27, 2025
Summary
A ≥ 3 grade improvement in corneal staining is a clinically meaningful outcome for dry eye disease (DED). This measure consistently correlates with significant symptom relief in patients with DED.
Area of Science:
- Ophthalmology
- Clinical Research
- Dry Eye Disease Therapeutics
Background:
- Clinical studies for dry eye disease (DED) often show statistical significance but lack clarity on clinical meaningfulness.
- Quantifying meaningful improvement in DED patient outcomes remains a challenge.
Purpose of the Study:
- To correlate corneal punctate erosions with patient-reported symptoms in DED.
- To define a "corneal staining responder" as a clinically meaningful outcome measure for DED.
Main Methods:
- Retrospective analysis of 4 randomized, controlled studies involving 1704 adult DED patients.
- Corneal staining assessed using fluorescein dye (0-15 scale); "responder" defined as ≥ 3 grade improvement.
- Patient symptoms evaluated via visual analogue scale (0-100).
Main Results:
- Corneal staining responders demonstrated numerically greater improvement in all DED symptoms compared to non-responders.
- Statistically significant symptom improvement was observed in 75% of comparisons between responders and non-responders.
- Findings were consistent across studies, regardless of treatment, demographics, or DED type.
Conclusions:
- A ≥ 3 grade improvement in corneal staining score is a reliable indicator of clinically meaningful symptom improvement in DED.
- This definition of a "corneal staining responder" can be valuable for clinical studies and patient care.
- Establishes a physician-measured outcome that correlates with patient-reported benefits in DED management.
