Journal: Investigative Ophthalmology & Visual Science

Article Title: Retinal Neurovascular Signatures in Parkinson's Disease

doi: 10.1167/iovs.66.11.10

Figure Lengend Snippet: RBF and RTV measurements in the macular region. ( A ) RBF was assessed using the RFI within a circular region (Ø 2.5 mm) centered on the fovea. Arterioles ( red ) and venules ( pink ) are visualized with their respective flow velocities (mm/s) overlaid. Vessel diameters were measured at points where vessels intersected the 2.5 mm circle. These data were used to calculate flow for all arterioles ( green dots ) and venules ( yellow dots ). Total retinal blood flow into the fovea (arteriolar) and out of the fovea (venular) has been demonstrated to be roughly equivalent. Therefore, total arteriolar and venular flows were calculated by summing individual flow volumes of all vessels crossing the 2.5 mm circle. The average of the two vessel types was considered the region's RBF. ( B ) RTV was measured using OCTA within an annular region centered on the fovea, with a 2.5 mm outer diameter and a 0.6 mm inner diameter. The RTV included the inner retinal layers: RNFL, GCIPL, inner nuclear layer (INL), and outer plexiform layer (OPL). ( C ) RTV of the same inner retinal layers was quantified using the AngioVue OCTA system, applying the same annular region shown in ( B ).

Article Snippet: RVD, RVLD and RTV were measured using an AngioVue optical coherence tomography angiography (OCTA) system (AngioVue, Optovue, Inc., Fremont, CA), which operates at a scanning speed of 70,000 A-scans per second and provides an axial resolution of 5 μm.

Techniques:

Journal: BMC Ophthalmology

Article Title: Comparing structural and vascular parameters between healthy eyes and eyes with primary angle-closure disease

doi: 10.1186/s12886-025-04606-7

Figure Lengend Snippet: Sample OCTA images illustrating vessel density in the radial peripapillary capillary slab and superficial capillary plexus a normal control eye b primary angle-closure suspect c primary angle-closure and d primary angle-closure glaucoma. Vessel density shows a generalized reduction across the PACD spectrum, consistent with the quantitative analyses in Tables , and

Article Snippet: Optical coherence tomography angiography (OCTA) of the circumpapillary and macular area was done by tri-dimensional RTVue OCTA (Optovue, Inc) with AngioVue software (software version 2018.0.0.18).

Techniques: Control