Retinal Capillary Visualization
Retinal Capillary Visualization - Related Videos
11:20
Fabrication and Visualization of Capillary Bridges in Slit Pore Geometry
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Cited by 4 •
2014
A procedure for creating and imaging capillary bridges in slit-pore geometry is presented. The creation of capillary bridges relies on the formation of pillars to provide a directional physical and chemical heterogeneity to pin the fluid. Capillary bridges are formed and manipulated using microstages and visualized using a CCD camera.
02:24
AAV-Mediated Gene Delivery for Visualization of Compromised Retinal Membrane Integrity
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2026
Source: Vacca, O., et al. Using Adeno-associated Virus as a Tool to Study Retinal Barriers in Disease. J. Vis. Exp. (2015).This video demonstrates the method of AAV-mediated gene delivery in a transgenic mouse retina, followed by tissue dissection and staining to assess inner limiting membrane integrity.
08:50
Capillary Electrophoresis (CE)
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Capillary electrophoresis (CE) is a separation technique that separates molecules in an electric field according to size and charge. CE is performed in a small glass tube called a capillary that is filled with an electrolyte solution. Analytes are separated due to differences in electrophoretic mobility, which varies with charge, solvent viscosity, and size. Traditional electrophoresis in gels is limited in the amount of voltage...
08:56
Visual Detection of Multiple Nucleic Acids in a Capillary Array
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Cited by 3 •
2017
This protocol describes the fabrication of a small, ready-to-use cassette that can be applied for visual detection of multiple nucleic acids in a single, test that is easy to operate. In this approach, a capillary array was used for multiplex and highly efficient detection of GMO targets.
14:53
Capillary Electrophoresis Separation of Monoclonal Antibody Isoforms Using a Neutral Capillary
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Cited by 2 •
2017
Here, we present a comprehensive capillary zone electrophoresis protocol for the assessment of intrinsic physicochemical heterogeneity of monoclonal antibodies as a quality attribute.
FAQs
Optical coherence tomography angiography (OCTA) identifies capillary flow through motion-related changes in backscattered light. Computational reconstruction converts those signal changes into maps of the retinal capillary network, allowing vessel density, branching, and flow to be examined without relying on dye passage. This mechanism makes OCTA useful for structural and perfusion analysis within the same imaging framework.
Fluorescein angiography emphasizes how a dye travels through retinal vessels, rather than inferring perfusion from motion-related optical signals. The resulting images can show vessel filling and leakage, adding information about abnormal permeability. OCTA and fluorescein angiography therefore provide complementary views: one supports capillary-network and flow mapping, while the other highlights dye transit and leakage.
Image-analysis algorithms influence how capillary patterns are reconstructed and quantified. In retinal capillary visualization, improved algorithms can strengthen measurements of density, branching, and flow, while engineered contrast strategies may enhance the visibility of microvascular features. These bioengineering contributions matter because image usefulness depends not only on optical acquisition, but also on how vascular signals are represented for analysis.
A high-level workflow begins by selecting an optical approach suited to the measurement, acquiring retinal vascular signals, and reconstructing or interpreting the resulting image. OCTA processing focuses on motion-related backscattering, whereas fluorescein angiography tracks dye passage and evaluates filling or leakage. The final analysis can then quantify network features or identify permeability abnormalities relevant to retinal health.
Retinal capillary visualization can support early assessment of diabetic retinopathy and other retinal vascular diseases by making microvascular changes measurable. Vessel density, branching, flow, and abnormal permeability provide distinct readouts rather than a single qualitative impression. These measurements can help characterize vascular status and support evaluation of disease-related changes in the retina.
In treatment monitoring, repeated vascular measurements can help indicate whether retinal microvascular features change over time, including patterns related to flow or leakage. The same measurements also contribute to engineered models of ocular microcirculation, where capillary structure and perfusion serve as measurable biological parameters. This connects patient imaging with bioengineering efforts to represent retinal vascular behavior.