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Related Concept Videos

Visual System01:26

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.

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Related Experiment Video

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VisualEyes: A Modular Software System for Oculomotor Experimentation
10:41

VisualEyes: A Modular Software System for Oculomotor Experimentation

Published on: March 25, 2011

Vision egg: an open-source library for realtime visual stimulus generation.

Andrew D Straw1

  • 1Bioengineering, California Institute of Technology Pasadena, CA, USA.

Frontiers in Neuroinformatics
|December 4, 2008
PubMed
Summary
This summary is machine-generated.

The Vision Egg is a free, open-source Python library enabling real-time, high-fidelity visual stimulus generation for experiments. It simplifies creating complex visual displays for psychophysical and behavioral research.

Keywords:
Pythonopen sourcevisual stimulus generation

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Related Experiment Videos

Last Updated: Jun 27, 2026

VisualEyes: A Modular Software System for Oculomotor Experimentation
10:41

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Published on: March 25, 2011

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
09:42

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

Eye Movements in Visual Duration Perception: Disentangling Stimulus from Time in Predecisional Processes
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Eye Movements in Visual Duration Perception: Disentangling Stimulus from Time in Predecisional Processes

Published on: January 19, 2024

Area of Science:

  • Computer Science
  • Neuroscience
  • Psychology

Background:

  • Modern hardware allows for unprecedented visual stimulus generation.
  • Creating complex, calibrated visual stimuli for research is challenging.

Purpose of the Study:

  • Introduce the Vision Egg, a Python library designed to simplify visual stimulus generation.
  • Facilitate advanced visual stimulus creation for psychophysical, electrophysiological, and behavioral experiments.

Main Methods:

  • Utilizes OpenGL and Python with C extensions for high performance.
  • Incorporates careful luminance and temporal calibration.
  • Supports various input devices like mice, motion trackers, and digital triggers.

Main Results:

  • Enables real-time generation of arbitrary visual scenes, from gratings to 3D environments.
  • Provides tools for precise control over stimulus parameters.
  • Offers flexible interfacing with experimental hardware.

Conclusions:

  • The Vision Egg is a powerful, accessible tool for researchers needing sophisticated visual stimuli.
  • Its features support a wide range of experimental paradigms in vision science and related fields.