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This video shows coronal and cross-sectional views of the suggested mechanism for retinal displacement following pars plana vitrectomy. The small amount of residual subretinal fluid that remains at the completion of surgery along with the use of an intraocular gas tamponade may result in the displacement of subretinal fluid under the influence of the buoyant force of the gas bubble and gravity in a direction related to postoperative positioning. This generally results in fluid flowing from posterior to anterior and often inferiorly with a corresponding stretch of retina.
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