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Related Concept Videos

Visual System01:26

Visual System

1.9K
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...
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Vision01:24

Vision

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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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The Retina01:32

The Retina

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The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
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Anatomy of the Eyeball01:20

Anatomy of the Eyeball

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The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
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Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Related Experiment Video

Updated: Feb 19, 2026

Computational Modeling of Retinal Neurons for Visual Prosthesis Research - Fundamental Approaches
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Macular: a multi-scale simulation platform for the retina and the primary visual system.

Bruno Cessac1, Erwan Demairy2, Jérôme Emonet1

  • 1Université Côte d'Azur, Biovision Team and Neuromod Institute, Inria, Sophia Antipolis, France.

Frontiers in Neuroinformatics
|February 18, 2026
PubMed
Summary

Macular is a new simulation platform enabling neurobiologists to test hypotheses in silico for the retina and visual system. It allows customized 3D models and simulations without programming needs.

Keywords:
graphical user interfacein silico experimentsnumerical simulationsprimary visual systemretina

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Area of Science:

  • Neuroscience
  • Computational Biology
  • Systems Biology

Background:

  • The primary visual system and retina are complex, requiring advanced tools for hypothesis testing.
  • Current simulation methods may necessitate significant programming expertise, limiting accessibility for neurobiologists.

Purpose of the Study:

  • To introduce Macular, a user-friendly simulation platform for in silico experiments on the retina and primary visual system.
  • To enable researchers to create and test hypotheses without extensive programming knowledge.

Main Methods:

  • Development of Macular, a graphical interface platform for creating 3D neural network models.
  • Automatic C++ code generation and simulation interface creation based on user-defined cell and synapse equations.
  • Visualization of input videos, 3D structures, cell/synapse activity, and parameter adjustment.

Main Results:

  • Macular successfully generates complex in silico experiment scenarios for visual system modeling.
  • The platform supports user-created or pre-built cells and synapses, allowing for customizable models.
  • Example scenarios, including a retino-cortical model, demonstrate the platform's utility and alignment with published research.

Conclusions:

  • Macular provides a powerful, accessible tool for neurobiologists and modelers to conduct in silico research on the visual system.
  • The platform facilitates the simulation of various conditions, including natural, pharmacological, pathological, and developmental scenarios.
  • Macular lowers the barrier to entry for computational neuroscience, promoting hypothesis-driven research.