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Related Concept Videos

Stereoisomerism02:52

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Stereoisomers02:32

Stereoisomers

On the basis of mirror symmetry, stereoisomers of an organic molecule can be further classified into diastereomers and enantiomers. Diastereomers are stereoisomers that are not mirror images of each other. Substituted alkenes, such as the cis and trans isomers of 2-butene, are diastereomers, as these molecules exhibit different spatial orientations of their constituent atoms, are not mirror images of each other, and do not interconvert. Here, the interconversion is suppressed due to restricted...
Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
SN2 Reaction: Stereochemistry02:23

SN2 Reaction: Stereochemistry

In an SN2 reaction, the nucleophilic attack on the substrate and departure of the leaving group occurs simultaneously through a transition state. As the nucleophile approaches the substrate from the back-side, the configuration of the substrate carbon changes from tetrahedral to trigonal bipyramidal and then back to tetrahedral, leading to an inversion in the configuration of the product.
If the substrate is an achiral molecule at the α-carbon, the inversion of configuration is not observed.
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.

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Related Experiment Video

Updated: Jul 4, 2026

How to Create and Use Binocular Rivalry
14:34

How to Create and Use Binocular Rivalry

Published on: November 10, 2010

[Inverse stereoscopy]

J Reiner

    Klinische Monatsblatter Fur Augenheilkunde
    |January 1, 1995
    PubMed
    Summary
    This summary is machine-generated.

    Observing 3D objects with a binocular telescope causes inverse stereoscopy, making distant objects appear closer. This phenomenon requires good stereoscopic vision and highlights the accommodation-convergence discrepancy.

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    How to Create and Use Binocular Rivalry
    14:34

    How to Create and Use Binocular Rivalry

    Published on: November 10, 2010

    Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
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    Robotized Testing of Camera Positions to Determine Ideal Configuration for Stereo 3D Visualization of Open-Heart Surgery
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    Published on: August 12, 2021

    Area of Science:

    • Optics
    • Vision Science
    • Perception

    Context:

    • Binocular astronomical telescopes offer unique viewing conditions.
    • Inverse stereoscopy is a perceptual phenomenon where depth cues are reversed.

    Purpose:

    • To investigate the phenomenon of inverse stereoscopy.
    • To explore the relationship between accommodation and convergence.
    • To identify limitations in perceiving inverse stereoscopy.

    Summary:

    • Viewing three-dimensional objects through a binocular astronomical telescope induces inverse stereoscopy, reversing perceived depth.
    • This effect results from a discrepancy between the eye's accommodation and convergence mechanisms.
    • Individuals with impaired stereoscopic vision cannot perceive inverse stereoscopy.

    Impact:

    • Provides insights into the mechanisms of human stereoscopic vision.
    • Suggests potential applications in vision training or virtual reality.
    • Highlights the importance of binocular vision integrity for accurate depth perception.