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The fluorescein appearance test for lacrimal obstruction
Annals of Ophthalmology
|February 1, 1979
Summary
The fluorescein appearance test offers a simple, reliable method to check tear duct (lacrimal excretory system) patency. This objective test uses fluorescein dye and UV light, proving effective in diagnosing lacrimal obstructions.
Area of Science:
- Ophthalmology
- Anatomical Sciences
Background:
- The lacrimal excretory system's patency is crucial for normal tear drainage.
- Existing diagnostic methods can be invasive or time-consuming.
Observation:
- A novel fluorescein appearance test utilizes 2% fluorescein dye, ultraviolet light, and a tongue blade.
- The test involves instilling fluorescein into the conjunctival cul-de-sac and examining the oropharynx and nostrils under UV light.
Findings:
- The fluorescein appearance test demonstrated high reliability in normal subjects, with over 90% positive results within 30 minutes and 100% within 60 minutes.
- A correlation was observed between Schirmer test values and fluorescein appearance times, suggesting slower drainage in certain individuals.
- The test proved clinically valuable for evaluating epiphora and diagnosing lacrimal obstructions, with findings corroborated by nuclear dacryocystography.
Implications:
- This test provides a simple, painless, and objective method for assessing lacrimal excretory system function.
- It can aid in the early and accurate diagnosis of lacrimal pathway obstructions.
- The fluorescein appearance test may become a valuable tool in routine ophthalmological and ENT examinations.