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The use of pars plana vitrectomy (PPV) in different patient populations was a topic of discussion during two sessions at AAO 2019.The first was a paper titled &ldquo;Retinal Displacement Detected With Fundus Autofluorescence Imaging Following Pneumatic Retinopexy vs. PPV for RD Repair (INTEGRITY Study).&rdquo; This retrospective study included a consecutive series of eyes with three-month postoperative fundus autofluorescence (FAF) images. Retinal displacement was determined with retinal vessel printing on FAF and was compared for patients who underwent PPV (n = 137 eyes) versus pneumatic retinopexy (PnR; n = 114 eyes) for retinal detachment. In the PPV group, 44.4% of eyes had retinal vessel printing compared to 7.0% for PnR (P&lt;0.0001). Mean displacement was 0.293 &plusmn; 0.286 mm for PPV compared to 0.137 &plusmn; 0.086 mm for PnR (P=0.008). In eyes with displacement, 97.1% of PnR eyes and 76.5% of PPV eyes had optical coherence tomography interdigitation zone abnormalities and vertical metamorphopsia (P=0.005) compared to 84.0% and 56.2%, respectively, in those without displacement (P=0.03). The authors of the study concluded, &ldquo;Retinal displacement is more severe with PPV than with PnR and is associated with vertical metamorphopsia.&rdquo;The second study presented, &ldquo;The Influence of Diabetic Retinopathy on the Rate of Cataract Surgery Following PPV,&rdquo; was a scientific poster presentation. In this retrospective study, researchers evaluated a possible correlation between diabetic retinopathy and the risk of cataract extraction after PPV. Researchers used insurance claims database (PharMetrics; Virginia) information to identify PPV patients between 2006 and 2015. The primary outcome measure was the rate of cataract extraction following PPV. The following confounders were considered: age, sex, region, and Charlson Comorbidity Index. Final analysis included 14,475 patients, of whom 14.1% had cataract extraction. PPV patients had a significantly higher rate of cataract extraction compared to non-PPV patients (32.60% vs. 4.75%). Diabetic patients who underwent PPV had a lower hazard ratio of cataract extraction (3.497) compared to non-diabetic patients (5.193); the difference persisted among all diabetic subgroups with retinopathy (P&lt;0.001).

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The use of pars plana vitrectomy (PPV) in different patient populations was a topic of discussion during two sessions at AAO 2019. ...

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