Tear function in relation to the World Health Organization classification of cicatrization in trachoma.

In 102 patients equally divided into three groups with mild, moderate, and severe cicatricial trachoma, corresponding to the WHO numerical scoring of 1962, the tear function parameters (tear fluid lysozyme and lactoferrin concentrations), the rose bengal score, the Schirmer test, and the break-up time were studied. All parameters showed a statistically significant difference in tear function among the three groups. There was no statistically significant difference in measurements of tear function in subdivisions of the three groups.