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Contributor: Jared Scott, MD Educational Pearls: A rust ring can occur after a metallic foreign body is left in the eye for a prolonged period of time Issues occur when the rust ring is left as it can epithelialize and become a permanent spot in the patient's vision An eye burr or Alger brush can help to gouge out the rust ring in the emergency setting These tools have a failsafe mechanism to prevent the eye burr from going through layers past the cornea (though this does not work if the foreign body is already through the cornea) Referral to ophthalmology, antibiotic drops, and dilating drops are recommended options upon discharge Complications include poor wound healing, scarring, and infection References Camodeca AJ, Anderson EP. Corneal Foreign Body. [Updated 2021 Apr 26]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK536977/ https://www.reviewofoptometry.com/article/no-insult-to-injury-managing-foreign--body-removal Summarized by John Spartz, MS4 | Edited by Erik Verzemnieks, MD The Emergency Medical Minute is excited to announce that we are now offering AMA PRA Category 1 credits™ via online course modules. To access these and for more information, visit our website at https://emergencymedicalminute.org/cme-courses/ and create an account. Donate to EMM today!