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Late extrusion of intrastromal corneal ring segments: A report of two cases
Julius T Oatts1, Louis Savar2, David G Hwang1
1Cornea Service, Department of Ophthalmology, University of California San Francisco, San Francisco, CA, USA.
Purpose:
To report two cases of patients with late extrusion following uneventful implantation of intrastromal corneal ring segments (ICRS) for myopia.
Observations:
Two patients with previously implanted ICRS for low myopia presented with spontaneous onset of extrusion of their ICRS, one at 7 years post-operatively and the other at 17 and 20 years. Both cases underwent explantation and maintained excellent best-corrected visual acuity. These cases represent the longest reported intervals between implantation of the ICRS and subsequent extrusion.
Conclusions And Importance:
Late extrusion can occur many years following implantation of ICRS, even in eyes without pre-existing thinning or ectasia. The technique for explantation described herein can result in favorable clinical outcomes in such cases. These cases demonstrate the importance of long-term follow up of eyes that have undergone ICRS implantation.
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