<prompt> Herberts pit is seen in:Vernal conjunctivitisAtopic conjunctivitisGonococcal conjunctivitisChlamydial conjunctivitis  <response>: Ans: D Chlamydial conjunctivitis Ref Parsons Diseases of the Eye : 21st edition: pg no -- 172-175Explanation:TRACHOMA:Caused by Chalmydia trachomatis A, B, Ba, CSpread by 3Fs - Fingers, Fomites. FliesForms epithelial inclusion bodies - Halberstader Prowazek Inclusion BodiesConjunctiva - upper tarsal follicle which heals to form minute stellate scarsArlts Line - fibrous band in the tarsal plateLimbal follicles - Herbert Follicles - Herbert PitsCornea - Pannus - lymphocytic infiltration w ith vascularisation of corneaWHO CLASSIFICATION STAGESFEATURESTREATMENTFollicles5 follicles, 0.5mm in upper tarsusNeeds treatment No scarringIntense50 palpebral blood vessels not seenUregent treatmentComplications ScarringTarsal conj scarring with white fibrous bandsinactiveTrichiasisAt least cne trichiatic lashCorrective surgeryOpacitiesK opacity covering pupillary region SAFE STRATEGY:S - Surgery for trichiasis entropionA - AntibioticsF - Frequent face washE - Environmental sanitation 