en General گزارش مورد case report Introduction: Ocular chemical injury is an ophthalmic emergency that may be challenging to manage. Here, we presented a case of persistent corneal astigmatism secondary to chemical burn with superficial limbal injury and no corneal involvement.Case Presentation: The case was a 36-year-old man who presented with a chemical acid injury in the right eye. He had sectorial superficial involvement of inferior limbus from 4 to 5 o'clock hours, and the cornea was clear. Corneal topography showed high irregular astigmatism that was not corrected with glass. In long-term follow-up, changes in topographic parameters happened very slowly.Conclusions: In conclusion, optical corneal changes should be considered in the ocular surface chemical burn, especially in sectorial involvement despite clear cornea. Astigmatism,Eye,Chemical Burn 0 0 http://mcj.bums.ac.ir/browse.php?a_code=A-10-1-165&slc_lang=en&sid=1 Malihe Nikandish  10031947532846001979 10031947532846001979 Yes Ophthalmology Department, Valiasr Hospital, Birjand University of Medical sciences, Birjand, Iran. Email: nikandishm@bums.ac.ir