All are features of Trachoma stage III, except –
Stage III of trachoma is cicatrising or scarring stage. So, Herbert pits (are healed scars of Herbert follicles), scar on tarsal conjunctiva & necrosis in scar are all the features of stage III. Where as herbert follicles (IIa), papillary hyperplasia (IIb), Pannus is found in stage II.
Herbert's pits
Pannus
Necrosis in scar
Scar on tarsal conjunctiva