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| This glossary contains: 19186 medical terms |
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Fechner's Paradox
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Fechner's Paradox The fact that a monocular view may look brighter than a binocular view. Suppose that a scene is viewed through both eyes but that one eye sees it through a neutral filter that attenuates all wavelengths by a constant ratio. The filter does not distort the reflectances or ratios of light reaching the eye, but only its absolute intensity. If the filtered eye is entirely occluded the scene looks brighter and more vivid than with the filter despite the fact that less total light is reaching the two eyes and the reflectances are still the same.
RELATED TERMS--------------------------------------
Binocular
Using both eyes at the same time. Binocular vision is the most important element of depth perception.
Eye
The organ of sight. The eye has a number of components. These components include but are not limited to the cornea, iris, pupil, lens, retina, macula, optic nerve, choroid and vitreous.
SIMILAR TERMS--------------------------------------
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Fraternal twins
Born at the same time but resulting from the fertilization of two different eggs, fraternal twins are no more genetically similar than siblings; identical twins result from the division of one fertilized egg and are genetically identical.
Full-term
A baby born between 38 and 42 weeks' gestation.
Fundal height
The distance between the top of a pregnant woman's uterus (called thefundus) to her pubic bone. Measured to determine fetal age.
Feature binding
The binding of features processed by different systems (audio, visual) or of different subsystems (motion, depth, color) to create a unified conscious percept.
Feature matching
In Binocular Vision and Stereopsis, disparity can be extracted from an image if features in the two corresponding binocular images are matchable e.g. lines to lines, dots to dots.
Fechner's Paradox
Filling-In theory
Idea that the brightness and color of interiors of homogeneous regions are determined by a process of lateral spread of neural activation that is initiated by units responding to abrupt changes in luminance and wavelength.
First-Order statistics
Captures differences in overall brightness.
First-Order motion mechanisms
Captures motion information from moving objects or features that differ from the background in luminance.
Fixation
Alignment of the eyes so that the image of the fixated target falls on the area centralis. For animals with immobile eyes the alignment of the head towards the fixated target.
Flicker
Alternating levels of brightness.
RELATED TERMS--------------------------------------
Binocular
Using both eyes at the same time. Binocular vision is the most important element of depth perception.
Eye
The organ of sight. The eye has a number of components. These components include but are not limited to the cornea, iris, pupil, lens, retina, macula, optic nerve, choroid and vitreous.
SIMILAR TERMS--------------------------------------
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PREVIOUS AND NEXT TERMS--------------------------------------
Fraternal twins
Born at the same time but resulting from the fertilization of two different eggs, fraternal twins are no more genetically similar than siblings; identical twins result from the division of one fertilized egg and are genetically identical.
Full-term
A baby born between 38 and 42 weeks' gestation.
Fundal height
The distance between the top of a pregnant woman's uterus (called thefundus) to her pubic bone. Measured to determine fetal age.
Feature binding
The binding of features processed by different systems (audio, visual) or of different subsystems (motion, depth, color) to create a unified conscious percept.
Feature matching
In Binocular Vision and Stereopsis, disparity can be extracted from an image if features in the two corresponding binocular images are matchable e.g. lines to lines, dots to dots.
Fechner's Paradox
Filling-In theory
Idea that the brightness and color of interiors of homogeneous regions are determined by a process of lateral spread of neural activation that is initiated by units responding to abrupt changes in luminance and wavelength.
First-Order statistics
Captures differences in overall brightness.
First-Order motion mechanisms
Captures motion information from moving objects or features that differ from the background in luminance.
Fixation
Alignment of the eyes so that the image of the fixated target falls on the area centralis. For animals with immobile eyes the alignment of the head towards the fixated target.
Flicker
Alternating levels of brightness.
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This dictionary contains 19186 terms.
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