Purpose: To report indications and outcomes of combined pars plana vitrectomy and penetrating keratoplasty (PPV-PKP). Methods: A review of all patients who underwent PPV-PKP at the Illinois Eye and Ear Infirmary from January 1, 2001 to May 31, 2013, was performed. Ninety eyes of 90 patients were identified. Survival analysis was utilized to assess differences in retinal detachment (RD) and corneal graft failure rates among groups based on clinical and surgical variables. Results: Seventy-nine eyes met the inclusion criteria. Most common indications for vitrectomy and corneal transplantation were RD (65%) and corneal decompensation (43%), respectively. The preoperative and final visual acuity (VA) logarithm of the minimum angle of resolution values were 2.7 (0.31) and 2.5 (0.67) (hand motions; mean [SD]; P = .02); 15% of eyes were ≥20/400 and 15% gained ≥2 lines of vision following surgery. Corneal graft failure occurred in 51% (40 eyes), recurrent RD in 28% (22 eyes), and hypotony in 25% (20 eyes). Silicone oil endotamponade was associated with postoperative RD ( P = .045), and previous ocular trauma was associated with postoperative corneal graft failure ( P = .023). Conclusion: Combined PPV-PKP surgery was likely to achieve stabilization of VA, with a minority of eyes achieving modest gains in VA.
Risk factors for corneal graft failure and rejection in penetrating keratoplasty
