Shoaib A Tarin, Nafis ur Rehman.
Unusual Anterior Migration of Circling Scleral Explant.
Pak J Ophthalmol Nov ;11(1):9-10.

We report two unusual cases of postsurgical anterior migration, one delayed the other early, of 360° encircling Scleral explant. In one patient, a 70-year-old man, the complication developed 16 years after the retinal detachment surgery, and the explant had eroded through the corneal stroma and was found lying in the superotemporal cornea. In the second patient, a 47-yearold man, the complication arose just nine months after the procedure for a traumatic retinal detachment surgery, but the displaced explant did not invade the cornea.

CASE: A 70-year-old man presented in November of 1993 with complaints of pain, redness, and watering of the right eye. These symptoms had persistently existed for five months prior to his visit. The eye had been operated on somewhere else 16 years ago. However, examination revealed that a 360° encirclement with 2.0 mm wide silicone rubber band had been performed at the initial surgery. No other details were available. The vision was LP (light perception) in the left eye, which was phthisical. The right eye had optic atrophy but flat retina. The exposed solid silicone band was buried into the corneal stroma in its superonasal quadrant. Apparently, it had migrated forwards after cheesewiring through the insertions of medial and superior rectus muscles. The site of migration of band had engorged vessels in the episcleral region. Despite all of this, no pus or other apparent signs of infection were present. We dissected the cornea at the limbus and the adjoining conjunctival and episcleral tissues, removed the extruded portion of the explant, and resutured the partially split corneal tissue. The wound was covered with surrounding healthy conjunctiva.

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