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Table 2 The Simplified WHO grading system assessment of trachoma communities

From: Determinants of active trachoma among rural children aged 1–9 years old in Aw-Bare Wereda, Somali Region of Ethiopia: a cross-sectional study

Grade of trachoma

Characteristic to diagnose

trachomatous inflammation-follicular (TF):

The presence of five or more follicles of at least 0.5 mm in the upper tarsal conjunctiva.

Trachomatous Inflammation -Intense (TI

Pronounced inflammatory thickening of the tarsal conjunctiva that obscures more than half of the normal deep tarsal vessels

Trachomatous Scarring (TS

Presence of scarring in the tarsal conjunctiva(TS)

Trachomatous Trachealis(TT):

At least one eyelash rubs on the eyeball, or there is evidence of recent removal of in-turned eyelashes