40 sclera destroyed because of blue spots

Record number: 
976
Adverse Occurrence type: 
MPHO Type: 
Estimated frequency: 
This problem happened before in 2008 at the same tissue establishment.
Alerting signals, symptoms, evidence of occurrence: 
Detected by treating physician before transplant
Demonstration of imputability or root cause: 
Investigation by tissue establishment: used materials, electron microscope scan, experiments with used meterial. Cause most likely originating from disposables. 40 sclera in stock also had blue spots and were destroyed.
Suggest references: 
AAA