Modificación del sistema de clasificación simplificada del tracoma

Translated title of the contribution: The simplified trachoma grading system, amended

Anthony W. Solomon, Amir B. Kello, Mathieu Bangert, Sheila K. West, Hugh R. Taylor, Rabebe Tekeraoi, Allen Foster

Research output: Contribution to journalArticlepeer-review


A simplified grading system for trachoma was published by the World Health Organization (WHO) in 1987. Intended for use by non-specialist personnel working at community level, the system includes five signs, each of which can be present or absent in any eye: (i) trachomatous trichiasis; (ii) corneal opacity; (iii) trachomatous inflammation—follicular; (iv) trachomatous inflammation—intense; and (v) trachomatous scarring. Though neither perfectly sensitive nor perfectly specific for trachoma, these signs have been essential tools for identifying populations that need interventions to eliminate trachoma as a public health problem. In 2018, at WHO’s 4th global scientific meeting on trachoma, the definition of one of the signs, trachomatous trichiasis, was amended to exclude trichiasis that affects only the lower eyelid. This paper presents the amended system, updates its presentation, offers notes on its use and identifies areas of ongoing debate.

Translated title of the contributionThe simplified trachoma grading system, amended
Original languageSpanish
Pages (from-to)698-705
Number of pages8
JournalBulletin of the World Health Organization
Issue number10
StatePublished - Oct 2020

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


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