Results 331 to 340 of about 2,342,191 (355)

Innate and Adaptive Immunity of the Eye

2005
Publisher Summary The “immune privileged” status of the eye is believed to be based on five different mechanisms including: (1) the blood-ocular barrier, (2) the absence of lympha tic drainage from the eye, (3) soluble factors with immune regulatory properties in ocular fluids, (4) the expression of immune regulatory molecules on the epithelial cells
Nissen, Mogens Holst, Röpke, Carsten
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DARK ADAPTATION IN THE ALBINOTIC EYE

Archives of Ophthalmology, 1933
The occurrence of pigmentation in conjunction with visual function, from the most primitive photoreceptors to the complex mammalian eye, suggests that pigments form an integral part of the physiology of vision. 1a Schanz, making use of the known photo-electric effects of fluorescent dyes, based his theory of vision on the absorption of light by the ...
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The evolution and development of eye size in flies

Wiley Interdisciplinary Reviews: Developmental Biology, 2020
The compound eyes of flies exhibit striking variation in size, which has contributed to the adaptation of these animals to different habitats and their evolution of specialist behaviors.
F. Casares, A. McGregor
semanticscholar   +1 more source

Aquatic Adaptations in Fish Eyes

1988
Of all the sense organs, eyes have probably attracted the most attention because of both their central importance and intricate construction. Darwin knew that such “organs of extreme perfection and complication” posed a crucial test of his theory because they seemed too good to have been shaped by natural selection (Darwin [1859] 1958). Since eyes must
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The Avian Eye and its Adaptations

1977
The avian eye is considered to be “supreme amongst all living creatures” and capable of attaining “an order of excellence unmatched in any other species not excepting man” (Duke-Elder, 1958). Many structural and functional adaptations have become involved in the perfection of visual processes in birds which, according to Pumphrey (1948a) represent the ...
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Toward an adaptive model of the human eye

Journal of the Optical Society of America, 1980
A model of the human eye is presented with the crystalline lens treated as having a gradient-index structure. By defining an accommodation index I ranging from 0 (unaccommodated) to 1 (accommodated), the optical parameters of the eye in various states of accommodation may be found. The results are in agreement with experimental values.
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Adaptive Optics for Vision: The Eye's Adaptation to Point Spread Function

Journal of Refractive Surgery, 2003
ABSTRACT PURPOSE: Despite the fact that ocular aberrations blur retinal images, our subjective impression of the visual world is sharp, which suggests that the visual system compensates for subjective influence. If the brain adjusts for specific aberrations of the eye, vision should be clearest when looking through a subject's typical wave ...
David R. Williams, Li Chen, Enrique J. Fernández, Ben Singer, Pablo Artal, Silvestre Manzanera   +5 more
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Electrical Responses of the Light-Adapted Eye*

Journal of the Optical Society of America, 1953
Recordings of the human electroretinogram (an electrical response to light originating in the retina) are made while the eye is maintained at any one of three different levels of light adaptation. Conventional recording techniques and procedures are used.
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Effect of Instantaneous Flashes on Adaptation of the Eye: Dark Adaptation after Exposing the Eye to an Instantaneous Flash

Nature, 1963
Effect of Instantaneous Flashes on Adaptation of the Eye: Dark Adaptation after Exposing the Eye to an Instantaneous ...
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Two Laboratory Exercises Demonstrating Neural Adaptation: Eye-Hand Coordination and Anticipatory Postural Adjustments

, 2005
J. Buford
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