<prompt> Cobblestone appearance is seen in:TrachomaBacterial conjunctivitisVernal conjunctivitisViral conjunctivitis  <response>: Ans: c Vernal conjunctivitis Ref: AK Khurana, 4th ed, p. 74Cobblestone pavement stone--typical arrangement of hard flat topped papillae in palpebral conjunctivaVernal keratoconjunctivitisPhlyctenular conjunctivitis Exogenous allergendust, pollen Type I HS Bilateral Endogenous microbial proteinsTB, staph Type IV HSDelayed HS unilateral CF:itching, lacrimation, photophobia, ropy discharge Maxwell lyon sign CF; irritation, reflex lacrimation, discomfortitching not markedConjunctival signsPalpebralCobblestone appearanceFollicles are not seenBulbar signsGelatinous limbusHomer tranta spotsDusky red triangular congestion Conjunctival signsPhlyctennodule at limbus-characteristicConsists of subepithelial mononuclear infiltration in a triangular area with apex towards deeper margin Nodules ulcerate at apex.Corneal signsEpithelial erosionSubepithelial punctate erosionPseudogerantoxon with classic cupid bow outlineCorneal signsFascicular ulcerMiliary ulcerring ulcerScrofulous ulcerUlcer may present. Rx : steroid dropsRx: steroid drops 