Optical Visualization
Optical Visualization - Related Videos
12:23
Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients
0 Views •
Cited by 8 •
2014
Object From Motion (OFM) and Time-constrained stereo protocols are sensitive tools to identify monocular and binocular dynamic visual function deficits, which are uniquely affected in optic neuritis patients. Furthermore, these tests may be used as quantitative noninvasive tools to assess the extent of myelination along visual pathways.
06:49
Visual Evoked Potential Recording in a Rat Model of Experimental Optic Nerve Demyelination
0 Views •
Cited by 14 •
2015
Focal demyelination is induced in the optic nerve using lysolecithin microinjection. Visual evoked potentials are recorded via skull electrodes implanted over the visual cortex to examine the signal conduction along the visual pathway in vivo. This protocol details the surgical procedures underlying electrode implantation and optic nerve microinjection.
08:31
Three-dimensional Optical-resolution Photoacoustic Microscopy
0 Views •
Cited by 27 •
2011
Optical-resolution photoacoustic microscopy (OR-PAM) is an emerging technology capable of imaging optical absorption contrasts in vivo with cellular resolution and sensitivity. Here, we provide a visualized instruction on the experimental protocols of OR-PAM, including system configuration, system alignment, typical in vivo experimental procedures, and functional imaging schemes.
09:39
Optical Biosensing
0 Views •
2023
Optical biosensors utilize light to detect the binding of a target molecule. These sensors can utilize a label molecule, which produces a measurable signal such as fluorescence, or these sensors can be label-free and use the changes in optical properties, such as refractive index, to sense for the binding of the target molecule. This video introduces both label and label-free optical biosensors, demonstrates their use in the laboratory, and shows some applications of the technology.
06:49
The Rodent Model of Nonarteritic Anterior Ischemic Optic Neuropathy (rNAION)
0 Views •
Cited by 5 •
2016
The following report describes how to replicate the rodent model of nonarteritic anterior ischemic optic neuropathy (rNAION), using the appropriate dye, contact lens and laser parameters. We also reveal the appropriate steps for evaluating the rNAION lesion in vivo.
FAQs
The observed signal depends on how the specimen interacts with illumination. Transmitted light reveals light passing through the sample, whereas reflected or scattered light provides other forms of optical contrast. Emitted light, including fluorescence from labeled molecules, can highlight selected biological features. Choosing among these signals affects which structures or processes become measurable.
Fluorescence allows imaging to focus on labeled molecules by detecting light released from those molecules rather than relying only on transmitted, reflected, or scattered light. Filters help select the detected signal before a digital detector records it. This approach supports examination of where labeled molecules are located within cells or tissues.
Lenses, filters, and digital detectors perform different parts of the measurement chain. Lenses help form an image, filters regulate which light contributes to the recorded signal, and detectors convert that signal into data for observation or analysis. Their combined use supports both visual examination and quantitative measurements of morphology, localization, and dynamics.
A biological imaging workflow begins by illuminating the specimen, selecting the light interaction or emitted signal of interest, and collecting it through optical components for detection. The recorded image can then be examined visually or analyzed quantitatively. This sequence links the physical light signal to measurements of structure, molecular position, or change over time.
Optical visualization is useful when biology must be examined at more than one scale or timescale. Microscopy and tissue examination reveal organization, while live-cell imaging follows processes as they occur. Depending on the experiment, measurements can focus on morphology, localization, or dynamics, allowing observations to connect cellular details with broader tissue function.
In biology, the method helps bridge molecular events and cellular or tissue function. A labeled molecule may be localized within a cell, while imaging can also document structural organization or changes over time. This combination makes optical visualization relevant to questions about where biological components are positioned, how structures are arranged, and how processes unfold.