The reported device, intended for use in treatment, was received for independent evaluation.There was a relationship found between the returned device and the reported incident.Visual inspection of the returned device noted scratched and dented housing and film on the lens.Functional evaluation revealed color registration issues as bluish noise on the borders of the display image.The device did not overheat.Further investigation revealed a faulty prism assembly.The complaint has been confirmed and the root cause has been associated with an electrical complaint failure.Factors, unrelated to the manufacturing and design of the device which could have contributed to the reported event, include an impact event to the device inconsistent with normal use.A review of the device history records showed there were no indications to suggest that the product did not meet manufacturing specification or would not be able to perform as intended.A complaint history review concluded this was a repeat issue.
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