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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Biomaterials. 2011 Sep 7;32(34):8783–8796. doi: 10.1016/j.biomaterials.2011.08.010

Figure 1.

Figure 1

(A) Schematic diagram of the B-KPro composed of optical quality PMMA shaped like a collar-button and implanted into a corneal graft secured with a titanium locking ring. (B) Photograph of the B-KPro composed of PMMA. (C) Photograph of the B-KPro in a corneal allograft implanted in a patient and secured by 16 sutures. This patient had three previous standard corneal graft failures; visual acuity is now 20/25. (D) Chemical structure of long-chained, linear N,N-hexyl,methyl-polyethylenimine (HMPEI).