Persistent central haze after cornea transplantation

Record number: 
Adverse Occurrence type: 
MPHO Type: 
Estimated frequency: 
Two simular reports in 2012 and five in 2011
Alerting signals, symptoms, evidence of occurrence: 
Best corrected visual unknown
Demonstration of imputability or root cause: 
Extensive investigation of all SAR didn't lead to a cause. Some recipient had a second transplantation
Suggest references: 
TRIP annual report 2012 Biovigilance