Related Experiment Videos
[Quantitative tear study using the red phenol test in the Brazilian population]
Richard Yudi Hida1, Maria Cristina Nishiwaki-Dantas, Milton Massato Hida
1Departamento de Oftalmologia, Hospital Central da Irmandade, Faculdade de Ciências Médicas, Santa Casa de Misericórdia de São Paulo, São Paulo, SP. ryhida@mandic.com.br
Arquivos Brasileiros De Oftalmologia
|December 3, 2005
Summary
This study determined normal red phenol thread test values in Brazilians, finding an intermediate result compared to other populations. These findings aid in understanding tear film dynamics across diverse demographics.
Area of Science:
- Ophthalmology
- Physiology
Background:
- The red phenol thread test measures tear film function.
- Establishing population-specific normal values is crucial for accurate diagnosis.
Purpose of the Study:
- To establish normal red phenol thread test values in the Brazilian population.
- To compare these values across different races, age groups, and sexes.
Main Methods:
- Analyzed 560 eyes from 280 white and 560 eyes from 280 non-white individuals.
- Excluded participants with ocular diseases or contact lens/drug use.
- Utilized the Phenol Red thread test for tear film assessment.
Main Results:
- The mean red phenol thread test result was 19.77 +/- 7.90 mm across 1,120 eyes.
- Preliminary analysis suggests potential variations based on race, age, and sex.
Conclusions:
- The Brazilian population's mean red phenol thread test value is intermediate compared to Japanese and American populations.
- This data contributes to a broader understanding of ethnic variations in tear film physiology.