Background: Timely detection of early microvascular changes in patients with prediabetes could help reduce the likelihood of progression of diabetes-related retinal complications. Aim: To determine early microvascular changes in patients with prediabetes using optical coherence tomography angiography (OCT-A). Methods: In this single-center retrospective case-control study, macular OCT-A images of superficial capillary plexus (SCP) and deep capillary plexus (DCP) were analyzed in non-diabetic controls, and prediabetic and diabetic subjects. A quantitative analysis was performed using ImageJ software of the foveal avascular zone (FAZ) area, acircularity index (AI), perfusion density (PD), and vascular length density (VLD). Results: A total of 94 eyes of 53 patients were included in this study. The global mean age was 57.7 years, 39.6% men and 60.4% women. In SCP, the mean PD was 0.283 ± 0.15, 0.186 ± 0.720, and 0.186 ± 0.07 in non-diabetic controls, and prediabetic and diabetic groups, respectively. The mean VLD was 8.728 ± 3.425 in non-diabetic controls, 6.147 ± 1.399 in prediabetic group, and 6.292 ± 1.997 in patients with diabetes. The comparison of prediabetic patients and controls shows statistical differences between PD and VLD in both plexus SCP ( p = 0.002 and p = 0.001, respectively) and DCP ( p = 0.005 and p = 0.002, respectively). The mean area of FAZ in patients with diabetes and normal individuals was 0.281 and 0.196 mm2, respectively ( p < 0.001). AI was higher in the control group (0.87 ± 0.14) and prediabetic group (0.80 ± 0.17) compared to diabetic patients (0.64 ± 0.19). There were no differences in FAZ area and AI between prediabetic and non-diabetic controls. Conclusion: PD and VLD demonstrated to be early microvascular changes in prediabetic patients evaluated by OCT-A. No alterations of FAZ were evidenced in this group.

The aim of this article is to report the usefulness of the plasma rich in growth factors for persistent macular hole closure. At the end of follow-up, complete macular hole closure was achieved in both cases. The use of plasma rich in growth factors may be an effective and safe surgical technique for persistent macular hole.

No abstract

BACKGROUND AND OBJECTIVES: To describe the imaging characteristics of polypoidal choroidal vasculopathy (PCV) in optical coherence tomography angiography (OCTA) and demonstrate its use as diagnostic method for this pathology in a Latin American population. PATIENTS AND METHODS: A case series. RESULTS: Fourteen eyes were evaluated. At baseline, the most frequent morphology was the “oval” type (76.9%), obtaining a reduction of 53.8% after treatment. The intrinsic finding of the polyps was hyporeflective content prior to treatment (80.8%), which reduced after treatment (7.7%) ( P = .016). CONCLUSIONS: OCTA is a useful imaging tool for detecting findings that can guide the diagnosis of PCV without contrast medium. Likewise, it provides signs that can suggest the behavior of the lesion prior to and after treatment, enriching the understanding of the pathology and therefore aiming to an efficient therapy. To the best of the authors' knowledge, this is the first study in a Latin American population. [ Ophthalmic Surg Lasers Imaging Retina . 2018;49:748–756.]

BACKGROUND AND OBJECTIVE: Neovascularization is a sight-threatening, uncommon complication of posterior uveitis that often goes undetected until persistent clinical findings appear, or in light of treatment failure. This could be attributed to the relative similarity of activity signs in inflammatory neovascular membranes (NVM) and active posterior uveitis. The purpose of the present study is to recognize imaging features that distinguish uveitic neovascularization from active uveitis using swept-source optical coherence tomography angiography (SS-OCTA). PATIENTS AND METHODS: Cross-sectional study. Patients with posterior uveitis with visual acuity (VA) decrease and at least one of the following findings were assessed by SS-OCTA: retinal thickening, subretinal or intraretinal fluid, and retinal hyperreflective areas. The change of VA and imaging features after treatment with anti-vascular endothelial growth factor (VEGF) therapy were analyzed in cases with inflammatory NVM. RESULTS: Forty-five eyes of 40 patients were evaluated. Twenty-four eyes (53.3%) showed signs of activity, of which eight (33.3%) presented inflammatory NVM. Imaging features that differentiate inflammatory neovascularization from active posterior uveitis included: vitreous cellularity ( P = .003), outer retinal infiltration ( P = .08), choroidal thickness ( P = .003), posterior shadowing ( P = .013), subretinal fluid ( P = .04), and neovascular network ( P ≤ .001). According to NVM characteristics by OCTA, multiple anastomoses and peripheral arcades were visualized at baseline in 85.7% of cases. Mean pre-operative best-corrected VA of inflammatory NVM was 20/150 (logMAR: 0.88 ± 0.60) with significant improvement to 20/40 (logMAR: 0.32 ± 0.22) after anti-VEGF treatment ( P = .027). CONCLUSIONS: SS-OCTA achieves the distinction of inflammatory NVM from active posterior uveitis through specific imaging features. Inflammatory neovascularization presents a suitable response after anti-VEGF therapy. [ Ophthalmic Surg Lasers Imaging Retina . 2021;52:129–137.]