E-ISSN: 2454-2784 P-ISSN: 0972-0200 95 Delhi Journal of Ophthalmology Vol. 32, No. 1, July-September 2021 DJO Introduction A 34-year-old male patient, welder by occupation came for his routine eye check-up. He had past history of episodes of iron metal chips fown into both of his eyes while working without protective eye wear few years back. Examination of his right eye revealed macular corneal opacity, whereas his left eye revealed Coats’ white ring of 1.5 mm diameter near the temporal limbus (Figure 1A and 1B). Coats’ white ring is a form of iron deposition in the cornea which is often circular or oval in shape and was frst described by George Coats. It is located within the Bowman’s membrane or the anterior stroma, and is composed of a complete or incomplete ring of discrete white dots. The overlying epithelium is smooth and intact. The lesion(s) are associated with previous metallic corneal foreign bodies. 1,2 It is usually seen in the area of incompletely removed rust ring in the cornea. Calcium was thought to be the cause of the lesion as an occupational injury in limestone workers. 3 But the lesion doesn’t contain calcium or lipid as it was thought before. Histochemical analysis confrmed the presence of iron within the lesion. 4 Patients with Coats ring are asymptomatic. These incidental fndings don’t require any treatment. References 1. Reidy, JJ . Corneal and Conjunctival Degenerations. In: Mannis MJ, Holland EJ. Cornea: Fundamentals, Diagnosis and Management Vol:1 4th ed. New Delhi: Elsevier; 2016. pp. 858- 859 2. Stallard HB. White Rings In The Cornea. Br J Ophthalmol. 1934;18:452-453 3. Miller EM. Genesis of white rings of the cornea. Am J Ophthalmol.1966 ;61:904-7. 4. Nevins RC, Davis WH, Elliot JH. Coats' white ring of the cornea—unsetled metal fetle. Arch ophthalmol. 1968;80:145– 146. Coats’ White Ring: The Embellished and Spruced up Iron Remnant in the Cornea Vishnu Teja Gonugunta Department of of Cornea & Refractve Surgery Services, Aravind Eye Hospital, Madurai, Tamil Nadu, India. Abstract Coats’ white ring can be a common fnding in the cornea following incomplete removal of the iron rust ring afer ocular trauma with iron partcles. Though the fnding is common and innocuous, it’s etology is rarely understood and commonly considered as a corneal opacity following an ocular injury and less recognised as a distnct entty. It can be diagnosed from the history and the typical appearance as a ring of discrete white dots in the subepithelial layers with intact epithelium. Patents are asymptomatc and treatment is not required. Delhi J Ophthalmol 2021;32; 95-96; Doi htp://dx.doi.org/10.7869/djo 703 Keywords: Coats’ White Ring, Rust Ring, Iron Depositon, Cornea, Ocular Trauma. PG Snippet Figure 1b: 16X magnifcaton shows the typical ring of discrete white dots in the cornea with few white dots in the centre of the ring. Figure 1a: 10X magnifcaton shows the locaton of the lesion in the cornea near the limbus.