title: [Quantitative tear study using the red phenol test in the Brazilian population].
abstract: OBJECTIVE
  To detect normal values of red phenol thread test in the Brazilian population and compare it between different races, age and sex.
  
  
  METHODS
  280 white individuals (560 eyes) and 280 non-white individuals (560 eyes) were analyzed regarding sex and age, and analyzed using the Phenol Red test. Individuals with ocular diseases, contact lens or ocular drug users were excluded from this study.
  
  
  RESULTS
  Of the 1,120 evaluated eyes, the mean +/- standard deviation result was 19.77+/-7.90 mm.
  
  
  CONCLUSIONS
  The mean result found in this study was an intermediate value compared to the previously studied populations (Japanese and American).
authors.affiliation: Departamento de Oftalmologia, Hospital Central da Irmandade, Faculdade de Ciências Médicas, Santa Casa de Misericórdia de São Paulo, São Paulo, SP. ryhida@mandic.com.br
authors.forename: Richard Yudi
authors.initials: RY
authors.lastname: Hida
authors.forename: Maria Cristina
authors.initials: MC
authors.lastname: Nishiwaki-Dantas
authors.forename: Milton Massato
authors.initials: MM
authors.lastname: Hida
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tsubota
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D001938:Brazil / Q000208:ethnology; D002648:Child; D002675:Child, Preschool; D004396:Coloring Agents; D003315:Cornea / Q000737:chemistry; D015352:Dry Eye Syndromes / Q000175:diagnosis; D005006:Ethnicity; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D009994:Osmolar Concentration; D010637:Phenolsulfonphthalein; D012016:Reference Values; D012680:Sensitivity and Specificity; D017678:Sex Distribution; D018709:Statistics, Nonparametric; D013666:Tears / Q000378:metabolism*
chemical_list: D004396:Coloring Agents; D010637:Phenolsulfonphthalein