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相关概念视频

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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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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Color Vision01:24

Color Vision

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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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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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UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

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Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in...
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Genetic Lingo01:11

Genetic Lingo

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Overview
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相关实验视频

Updated: Feb 22, 2026

Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System
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Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System

Published on: May 6, 2015

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研究人类L圆光谱灵敏性功能的与种族相关的变异性.

Allie C Schneider1, Takuma Morimoto1, Michelle E McClements2

  • 1Department of Experimental Psychology, University of Oxford, Oxford, UK.

Vision research
|February 20, 2026
PubMed
概括
此摘要是机器生成的。

人类光受体光谱灵敏度存在个体差异. 对于L-形光色素变异的等位基因频率因种族而异,影响了标准观察者函数表示.

关键词:
圆光谱灵敏度 圆光谱灵敏度与种族相关的变异性.人类的色彩视觉是人类的色彩视觉.这是一个GnomADAD.

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Visualizing Visual Adaptation
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Visualizing Visual Adaptation

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Determination of Photoreceptor Cell Spectral Sensitivity in an Insect Model from In Vivo Intracellular Recordings
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Determination of Photoreceptor Cell Spectral Sensitivity in an Insect Model from In Vivo Intracellular Recordings

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相关实验视频

Last Updated: Feb 22, 2026

Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System
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Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System

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Visualizing Visual Adaptation
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Visualizing Visual Adaptation

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Determination of Photoreceptor Cell Spectral Sensitivity in an Insect Model from In Vivo Intracellular Recordings
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科学领域:

  • 视觉科学 视觉科学 视觉科学
  • 遗传学 是一个遗传学.
  • 摄影生物学 摄影生物学

背景情况:

  • 人类光受体的光谱敏感性表现出个体差异,即使在颜色正常的个体中也是如此.
  • 了解这些变化对于评估平均光谱灵敏度函数的准确性至关重要.
  • 由OPN1LW编码的L形光色素是光谱灵敏度个体差异的已知来源.

研究的目的:

  • 为了研究L(S180) 和L(A180) 等位基因的频率的群体差异.
  • 评估这些等位基频率变化如何影响光谱灵敏度函数中的种群级别表示.
  • 探索对标准观察员函数和个性化的圆基本原理的影响.

主要方法:

  • 对已发表的关于等位基频率的报告进行分析.
  • 检查基因组测序数据库 (gnomAD) 的数据.
  • 在不同报告的种族类别中对等基因频率的比较.

主要成果:

  • 对于L(S180) 和L(A180) 的估计异基因频率,在报告的种族类别中显示出显著的差异.
  • 这表明,历史上使用的数据集可能不平等地代表所有人口群体.
  • 从这些数据集中衍生出的L-圆光谱灵敏度函数可能并不普遍适用.

结论:

  • 在L-形光色素等位基因的种群水平变异有助于光谱灵敏度的差异.
  • 标准的观察员功能可能无法充分捕捉不同人群中人类视觉感知的全部范围.
  • 需要进一步研究个性化的圆基本面,以解决这些代表性差距.