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Trachoma WHO grade: TT with CO
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WHO grade: trachomatous trichiasis (TT) with corneal opacity (CO) This is the upper tarsal conjunctiva of a patient with trichiasis and corneal opacity. The patient has entropion (inversion of eyelid) and the lashes rub on the cornea which shows signs of opacity. There is also evidence of removal and/or trimming of eyelashes. An exudate mats the remaining eyelashes together, and vessels have grown across the cornea. Note: WHO = World Health Organization.