Abstract
Abstract: :
Purpose: To describe the relationship of LogMAR visual acuity, Fine Matrix Mapping , SLO autofluorescence assessments and OCT in a case series of visually stabilised patients with PVR grade C3 or worse . Methods: 3 patients a minimum of 3 months after surgery for PVR were recruited prospectively with 10 control subjects . LogMAR visual acuities and OCT 3000 measurements were documented together with SLO autoflouresence images . Photopic and Scotopic Fine Matrix maps were recorded together with Photopic, Scotopic–red and Scotopic–blue central fields in patients and controls. Results: SLO autofluorescence images were normal in patients with best corrected LogMAR acuity recordings between 0.3 and 0.8 (20/60 and 20/200). OCT– 3000 scans also did not identify pathology within outer retinal layers but demonstrated variable pathology from cystic edema to retinal holes within the inner retina. In the central three degrees of perimetry the median percentage decibel decrease from normal values was 25.5dB (67.1%) in scotopic red and 26.5dB (55.9%) in scotopic blue. Fine Matrix Map thresholds illustrate decreased sensitivities compared to normal controls. Conclusions: This pilot study demonstrated LogMAR visual acuity reduction in PVR patients correlate with inner retinal pathology only visable on OCT and that SLO autofluorescence suggest photoreceptor/RPE complex remains intact in PVR . Fine Matrix field measurements, SLO autoflourescence and OCT images suggest possible inner retinal pathology as the cause of visual loss in these patients. In visual field threshold assessments of the central three degrees, the neural pathways connected to cones appeared to be more adversely affected than those to rods.
Keywords: proliferative vitreoretinopathy • imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • vitreoretinal surgery