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The device with the lens was returned.The plunger lock and lens stop have been removed.Inadequate viscoelastic was observed in the device.The plunger and lens were advanced partially outside the nozzle tip.The plunger has overrode the lens.The lens was wrapped around the plunger with the leading haptic partially extended and the trailing haptic folded to the left side of the plunger.The nozzle tip had heavy stress on the top.The nozzle was removed and cleaned for further evaluation.The lens was removed during cleaning.Top coat dye stain testing was conducted withe acceptable results for the presence of top coat.A device history record review and a non-conformance review of the reported lot number was conducted.The deviation review did not reveal any potential contributing factors to the reported complaint and all corresponding production release specifications defined in the device master record were met.A non-qualified viscoelastic was indicated.The root cause of the reported complaint maybe related to a failure to follow the ifu.Inadequate viscoelastic was observed in the device.The ifu instructs: fully insert the ophthalmic viscoelastic device (ovd) cannula, perpendicular to the device, through the viscoelastic port, located in the lens stop portion of the device.Fill the device until ovd can be observed flowing to the "fill-to" line on the nozzle tip.This will require approximately 0.2 milliliters (ml) of ovd.Only use an alcon ovd qualified for use with the company pre-loaded delivery system that has been allowed to come to the operating room temperature.If inadequate viscoelastic is placed in the device this will cause inadequate coverage of the lens fold path which may cause the lens to advance incorrectly or become "stuck" in the device.Heavy stress was observed on the top.This type of damage is typically progressive and worsens as the lens is advanced.The damage on the top of the nozzle started in the thick wall cone area.Unusually high internal forces would be needed to create damage in this area.The two distinct areas of damage would indicate a progressive change that occurred as the lens was advanced.Damage in the thick cone wall section has been associated with the use of cold viscoelastic.The ifu instructs to use viscoelastic, which has been allowed to come to the operating room temperature.This type of damage typically occurs if the lens is not positioned correctly for advancement; if there is a lack of viscoelastic between the lens and the nozzle lumen; if the lens is advanced too rapidly or if the plunger is not positioned correctly at the trailing optic edge.If the plunger is not positioned at the trailing optic edge it can allow the lens to fold around the plunger tip making it too large to correctly advance through the narrow tip of the nozzle, which could cause damage to the tip or the lens.In addition, a non-qualified viscoelastic was used in the device.The ifu instructs: during device preparation and implantation of the company iol with the company preloaded delivery system, an alcon qualified ovd should be used.The use of an unqualified ovd may cause damage to the lens and potential complications during the device preparation and implantation steps.Lens may become stuck in the device: if inadequate viscoelastic is placed in the device this will cause inadequate coverage of the lens fold path which may cause the lens to become "stuck" in the device.Due to the use of a non-qualified viscoelastic.Material properties of non-qualified ovds may contribute to underfill, overfill, misfolding of the haptics, or other inconsistent folding outcomes.If the operating room temperature is too high (greater than 23 degrees centigrade / 73 degrees fahrenheit) lens folding consistency is negatively affected, the lens is more adherent and this may inhibit lens advancement.Any of the above listed causes alone, or in combination, may create the reported event.Topcoat dye stain testing was conducted withe acceptable results for the presence of topcoat.The manufacturer internal reference number is: (b)(4).
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