<prompt> Herbert pits are seen in trachoma at:LimbusLid marginPalpebral conjunctivaBulbar conjunctiva  <response>: Ans. a LimbusRef: A.K. Khurana 6th ed. 169-70, Parsons 21st ed.173 Herbert pits are oval or circular scar which is left after healing of Herbert pit in the limbus area.Other Signs of Trachoma: Conjunctival scarring Arlts line Sago grain folliclesBulbar follicles pathognomonic 