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/
Summarized by John Spartz, MS4 | Edited by Erik Verzemnieks, MD
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