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Additional information is provided in sections d.9, d.10, h.3, h.6 and h.11.The product under investigation is not a serviceable device.Therefore, a service record review was not performed.The handpiece (hp) was returned for this investigation.A non-conformance based review of the serial number was performed and did not reveal any potential contributing factors to the reported complaint.A manufacturing device history record (dhr) review was performed prior to product release to ensure that the product was manufactured in compliance with the device master record.Based on the assessment, the product met release criteria.A review for complaints reported against this serial number was performed.All relevant complaints found were reviewed as part of this investigation.The hp was received for testing on this investigation.A visual assessment of the returned sample found discolored red dot and dented irrigation line.The returned sample was connected to a calibrated system.The handpiece tuned successfully and completed a five minute burn-in test with the system set at 100% ultrasonic and torsional power.The handpiece was connected to dynamic tuning fixture (dtf) for stroke length testing on the longitudinal and torsional movements which found the handpiece to meet alcon specifications corneal burn is an issue that is occasionally reported with cataract surgery.Most corneal burns can be traced to issues related to surgical technique and not to malfunctioning equipment.Based on the information obtained, the root cause of the reported event is inconclusive.Manufacturer will continue to monitor data for evidence of adverse trending and take further action, as appropriate.The manufacturer internal reference number is: (b)(4).H.10 reflects all related report numbers associated with this product event that have been submitted at this time.
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