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Related Concept Videos

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...
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...
Sight Distance in a Vertical Curve01:29

Sight Distance in a Vertical Curve

Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
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.
Distance Corrections01:15

Distance Corrections

To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
Fischer Projections02:18

Fischer Projections

Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...

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Related Experiment Video

Updated: Jun 7, 2026

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
08:04

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

Published on: December 4, 2013

Stereo correspondence is optimized for large viewing distances.

Graeme P Phillipson1, Jenny C A Read

  • 1Neuroinformatics Doctoral Training Centre, Institute of Adaptive and Neural Computation, School of Informatics, Edinburgh University, Edinburgh, UK.

The European Journal of Neuroscience
|October 20, 2010
PubMed
Summary
This summary is machine-generated.

Human stereo vision does not adapt to viewing distance. Our study shows simulated distant disparities improve near-vision 3D perception, suggesting fixed neural tuning for stereo correspondence.

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Area of Science:

  • Visual neuroscience
  • Human psychophysics
  • Computational vision

Background:

  • Stereo 3D vision relies on matching images from both eyes.
  • Vertical disparity changes with viewing distance and eye posture.
  • Stereo correspondence must adapt or be fixed for optimal performance.

Purpose of the Study:

  • Investigate if human stereo correspondence adapts to viewing distance.
  • Determine the neural basis of stereo correspondence tuning.
  • Explore the influence of peripheral visual information on stereo perception.

Main Methods:

  • Conducted psychophysical experiments on stereo correspondence.
  • Manipulated vertical disparity patterns at different viewing distances.
  • Measured stereo performance at various visual field eccentricities.

Main Results:

  • Human stereo correspondence does not adapt to physical viewing distance.
  • Simulating distant disparities improved performance at near distances.
  • Peripheral vertical disparity significantly impacts central stereo task performance.

Conclusions:

  • Stereo correspondence appears hard-wired for specific disparity ranges, not dynamically adaptive.
  • V1 neurons likely tuned to near-zero vertical disparity.
  • Peripheral visual field plays a crucial role in modulating central stereo processing, possibly via neural cooperation.