<prompt> In the grading of trachoma, trachomatous inflammation -follicular is defined as the presence of5 or more follicles in the lower tarsal conjunctiva3 or more follicles in the lower tarsal conjunctiva5 or more follicles in the upper tarsal conjunctiva3 or more follicles in the upper tarsal conjunctiva  <response>: C i.e. Five or more follicles in the upper tarsal conjunctiva WHOs FISTO Classification of Trachoma F Trachomatous 5 or more follicles each of at least 0.5 mm Implies active disease which needs Follicles diameter present on upper tarsal conjutivaQ treatment Deep tarsal vessels should be visible through the follicles papillae If properly treated recovery occurs with no or minimal scarring I Trachomatos Due to intense inflamation follicles papillae are Implies severe infection with high risk Intense so numerous inflamed that more than 50 of palpebral conjuctival blood vessels can not be seen clearlyQ of complications Needs urgent treatment S Trachomatous Scarring Tarsal conjuctival cicatrization with white fibrous bands Old, now inactive infection T Trachomatous At least one eyelash rubs the eyeball Needs corrective surgery Trichiasis Evidence of recent removal of inturned eyelash 0 Trachomatous Corneal opacity covering pa of pupillary region Cause significant visual loss 618 Opacities 