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Corneal staining patterns in normal non-contact lens wearers
J D Schwallie1, C D Mckenney, W D Long
1CIBA Vision Corporation, Duluth, Georgia, USA.
Summary
Corneal fluorescein staining typically resolves within 1.2 days. This study found low variability between eyes and good consistency between examiners for grading corneal staining.
Area of Science:
- Ophthalmology
- Corneal Disease
- Diagnostic Accuracy
Background:
- Corneal fluorescein staining is a common diagnostic tool.
- Understanding its typical duration and variability is crucial for accurate interpretation.
Purpose of the Study:
- To evaluate the duration and location of corneal fluorescein staining.
- To assess inter-practitioner reliability in grading corneal staining.
Main Methods:
- 16 subjects were evaluated over a 2-week period.
- Corneal fluorescein staining was graded on a 0-4 scale by two practitioners.
- Staining duration and location were recorded.
Main Results:
- The average duration for staining above grade 0.5 was 1.2 ± 0.4 days.
- Inferior (50%) and nasal (20%) regions were most affected.
- Mean staining grades were 0.5 (right eye) and 0.6 (left eye).
- Inter-practitioner grading difference was minimal (0.1).
Conclusions:
- Corneal fluorescein staining shows low variability between eyes.
- Good consistency was observed between separate examiners.
- Data aids in defining normal staining and resolution times.