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Definition
| Specialized retinal cells that contact both the bipolar cells and the ganglion cells, and are especially significant in inhibitory interactions within the retina. |
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| The photopigment in rods that responds to light. |
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| One of three basic dimensions of light perception, varying from rich to pale. |
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| lateral geniculate nucleus |
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Definition
| The part of the thalamus that receives information from the optic tract and sends it to visual areas in the occipital cortex. |
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| A hypothesis of stimulus intensity perception stating that a wide range of intensity values can be encoded by a group of cells, each of which is a specialist for a particular range of stimulus intensities. |
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| A system in the retina that operates at high levels of light, shows sensitivity to color, and involves the cones. |
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| Referring to a concentric receptive field in which the center inhibits the cell of interest while the surround excites it. |
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Definition
| Referring to a concentric receptive field in which the center excites the cell of interest while the surround inhibits it. |
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| The central portion of the retina, packed with the most photoreceptors and therefore the center of our gaze. |
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| The length between two peaks in a repeated stimulus such as a wave, light, or sound. |
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Definition
| One of the two components of photopigments in the retina. |
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| Also called bar detector or edge detector. A cell in the visual cortex that responds best to an edge or a bar that has a particular width, as well as a particular orientation and location in the visual field. |
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Definition
| Neural cells in the retina that respond to light. |
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| opponent process hypothesis |
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Definition
| The theory that color vision depends on systems that produce opposite responses to light of different wavelengths. |
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Definition
| One of the two components of photopigments in the retina. |
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Definition
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Definition
| A class of interneurons of the retina that receive information from rods and cones and pass the information to retinal ganglion cells. |
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Definition
| A system in the retina that operates at low levels of light and involves the rods. |
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| A quantum of light energy. |
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Definition
| The receptive surface inside the eye that contains photoreceptors and other neurons. |
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Definition
| The portion of the visual field from which light falls on the optic disc. Because there are no receptors in this region, light striking it cannot be seen |
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Definition
| A class of cells in the retina whose axons form the optic nerve. |
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Definition
| The phenomenon by which interconnected neurons inhibit their neighbors, producing contrast at the edges of regions. |
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