<prompt> Arlts line are usually seen in:Ocular pemphigoidTrachomaVernal keratoconjunctivitisPterygium  <response>: Cicatricial trachoma linear scars may be seen in the sulcus subtarsalis, these are called Arltslines. Since its caused by Chlamydia trachomatis the antibiotic of choice is azithromycin. Ref: A.K KHURANA 2005, Chapter 4, Disease of The Conjunctiva, In the book, Opthalmology, 3rd Edition, Newdelhi, Page 90 