Frontiers | Vertebrate Bistable Pigment Parapinopsin: Implications for Emergence of Visual Signaling and Neofunctionalization...
... which photo-convert to stable photoproducts that revert to their original dark state by subsequent light absorption, similar to ... which are diversified with respect to spectral sensitivity to achieve vertebrate color vision. Here, an implication of ... which photo-convert to stable photoproducts that revert to their original dark state by subsequent light absorption, similar to ... Recent genome projects have revealed an unexpectedly large number of opsin genes for vision and non-visual photoreception in ...https://www.frontiersin.org/articles/10.3389/fevo.2017.00023/full
Equine vision - Wikipedia
2.2 Visual acuity and sensitivity to motion. *2.3 Color vision. *2.4 Sensitivity to light ... Therefore, the horse has a smaller field of depth perception than a human. The horse uses its binocular vision by looking ... The tapetum lucidum reflects light back onto the retina, allowing for greater absorption in dark conditions. The iris lies ... Visual acuity and sensitivity to motion. The horse has a "visual streak", or an area within the retina, linear in shape, ...https://en.wikipedia.org/wiki/Equine_vision
Visibility - Wikipedia
Visibility degradation is caused by the absorption and scattering of light by particles and gases in the atmosphere. Absorption ... Visibility perception depends on several physical and visual factors. A realistic definition should consider the fact that the ... and the depth of the beam. The intensity change dF is the result of these effects over a distance dx. Because dx is a measure ... and then to use the Fourier transform and the contrast sensitivity function of the HVS to assess visibility. The international ...https://en.wikipedia.org/wiki/Visibility
Jumping spider - Wikipedia
... with sensitivity extending into the ultraviolet range. As the eyes are too close together to allow depth perception, and the ... This visual component is used by some female jumping spiders for mate choice. Body size dimorphism seems to play a role in male ... The incoming green light is only focused on the deepest layer, while the other one receives defocused or fuzzy images. By ... Physiological experiments have shown they may have up to four different kinds of receptor cells, with different absorption ...https://en.wikipedia.org/wiki/Jumping_spider
CERKL Mutations Cause an Autosomal Recessive Cone-Rod Dystrophy with Inner Retinopathy | IOVS | ARVO Journals
Visual acuity ranged from 20/25 to light perception (Table 1). Fundus examination in the mildest disease expression showed ... Maps of sensitivity loss from light-adapted static perimetry complemented the kinetic perimetry results (Fig. 2B). F2,P2 and F1 ... 3A, bottom) a small (∼0.6 mm diameter), dark region at the fovea dominated by absorption of the SW excitation light by macular ... NFL thickness for circular scans around the optic nerve was calculated with the commercial OCT software, which uses the depth ...https://iovs.arvojournals.org/article.aspx?articleid=2185520
Non-spectrophotometric measurement of analyte concentrations and optical properties of objects - Block, Myron J.
While visual perception is very complex and not completely understood, one approach for relating the concentration of an ... or transmitted light from colored objects in the visible. The human visual system, while an incompetent spectrophotometer, is ... Any analyte with absorption bands in the response range of the detectors can be used. Further, the apparatus can be used to ... measurement using this system is sufficient vascular tissue such that the blood vessel bed can be sampled to sufficient depth ...http://www.freepatentsonline.com/5434412.html
Patente US5434412 - Non-spectrophotometric measurement of analyte concentrations and optical ... - Google Patentes
... paralleling color perception and colorimetry. The improvements are primarily concerned with improving the signal-to-background ... The apparatus and methods of the invention provide an analog of color perception of human vision, preferably in the near ... or transmitted light from colored objects in the visible. The human visual system, while an incompetent spectrophotometer, is ... Any analyte with absorption bands in the response range of the detectors can be used. Further, the apparatus can be used to ...http://www.google.es/patents/US5434412
When increased pond depth was coupled with decreased HRT, light absorption and photosynthetic performance further increased due ... Methods for sensitivity analysis •Exploring how data inputs and outputs can be elicited and presented using visual tools • ... Consumer Perceptions •Ease of Implementation •Quality or Suitability •Quality of Science •Equity of Costs •Equity of Benefits • ... as indicated by the decreased light absorption, light conversion efficiency and NRE. The physico-chemical environment in the ...https://nzresearch.org.nz/records?i%5Bcontent_partner%5D=University+of+Canterbury+Library&i%5Bthesis_level%5D=Doctoral&locale=en&recordset=research
Free Anatomy Flashcards about Chapter 17 A&P
undergo structural changes upon light absorption.. retinal is?. the light absorbing part of all visual photopigments. ... depth perception is lost and the observer must rely on learned clues to determine depth. ... anterior, posterior & horizontal ducts detect different movements (combined 3-D sensitivity). cristae is?. the semicircular ... Light passing through a convex lens the light is bent because?. is bent so that the rays converge to a focal point. ...https://www.studystack.com/flashcard-325210
Sunglass Technology | Sunglass History and Technology | Corning
Best contrast enhancement in faint to moderate light (ideal for skiing under cloudy sky). Color distortion. Improves depth ... results in the absorption of visible light, causing the lenses to darken. These tinted glasses will darken when exposed to UVs ... and later on to protect patients who had developed an abnormal sensitivity to light due to specific diseases. Not too ... Excellent visual acuity - good contrast enhancer. Minimal color distortion, reinforces natural green. Reduces glare ...https://www.corning.com/asean/en/products/advanced-optics/product-materials/specialty-glass-and-glass-ceramics/ophthalmic-glass/sunglass.html
Fluorescence-guided resection of brain tumor: review of the significance of intraoperative quantification of protoporphyrin IX...
In light of the similarity in the absorption and emission profile between the mixture form of HPD and the monomer form of PpIX ... overcome shortcomings of the human visual perception of fluorescence, leading to optimal tumor resection. ... A. E. Saarnak et al., "Influence of tumour depth, blood absorption and autofluorescence on measurement of exogenous ... This approach has a very high specificity but low sensitivity for zones with poor tumoral infiltration. It is limited in its ...https://www.spiedigitallibrary.org/journals/neurophotonics/volume-4/issue-01/011011/Fluorescence-guided-resection-of-brain-tumor--review-of-the/10.1117/1.NPh.4.1.011011.full?SSO=1
Wide-Field Optical Coherence Tomography of the Choroid In Vivo | IOVS | ARVO Journals
The role of fixational eye movements in visual perception. Nat Rev Neurosci. 2004;5:229-240. [PubMed] ... a) Depth-averaged en face view of the ONH of a 27-year-old subject, consisting of approximately 50 depth slices at the surface ... Sensitivity advantage of swept source and Fourier domain optical coherence tomography. Opt Expr. 2003;11:2183-2189. [CrossRef] ... In contrast to the common 800-nm region, scattering is reduced at the 1060-nm water absorption window, 22 which was ...https://iovs.arvojournals.org/article.aspx?articleid=2126124
Optics and vision - Wikipedia
Visual perception is the ability to interpret information and surroundings from visible light reaching the eye. The resulting ... cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth. ... such as better transmission of visible light and greater absorption of ultraviolet light. Some plastics have a greater index of ... which is dependent on the sharpness of the retinal focus within the eye and the sensitivity of the interpretative faculty of ...https://en.wikipedia.org/wiki/Optics_and_vision
Perception | Britannica.com
Relations found between various types of stimulation (e.g., light waves and sound waves) and their ... Perception, in humans, the process whereby sensory stimulation is translated into organized experience. That experience, or ... By this response, the subject indicates sensitivity to visual depth cues. To discover if prior visual experience is necessary ... If the ring is presented too soon or too late, theoretically, the contour absorption on which masking presumably depends is ...https://www.britannica.com/topic/perception
Volume 3 Issue 1 | Journal of Medical Imaging
Image Perception, Observer Performance, and Technology Assessment. Computational assessment of visual search strategies in ... Depth information is an important added value of 3-D systems over two-dimensional systems. Special focuses were devoted to the ... The average sensitivity and specificity are obtained as 95.94% and 99.21%, respectively. The area under curve is found as 0.932 ... XPCI-CT imaging provides greater soft tissue contrast than conventional absorption-based x-ray imaging modalities, permitting ...https://www.spiedigitallibrary.org/journals/journal-of-medical-imaging/volume-3/issue-01
Fish with red fluorescent eyes forage more efficiently under dim, blue-green light conditions
Although studies on visual sensitivity of T. californicus are rare (but see ), our own results obtained from the first pre- ... Red fluorescence increases with depth in reef fishes, supporting a visual function, not UV protection. Proc Biol Sci. 2014;281: ... Does brightness perception influence foraging success?. In order to keep the overall brightness similar in all spectral ... absorption and scattering is negligible (,1% at 600-650 nm at 4 cm distance, [16, 17]). To calculate the decrease of ...http://pubmedcentralcanada.ca/pmcc/articles/PMC5397785/
Most recent papers with the keyword Artificial Light | Read by QxMD
Simulation of visual perception and learning with a retinal prosthesis.. James Robert Golden, Cordelia Erickson-Davis, Nicolas ... The central clock regulates food intake, energy expenditure and whole-body insulin sensitivity, and these actions are further ... Although supercapacitors apply both cations and anions to store energy through absorption and/or Faradic reactions occurring at ... BACKGROUND: Three-dimensional camera systems that integrate depth assessment with traditional two-dimensional images, such as ...https://www.readbyqxmd.com/keyword/158264
Patent US6580935 - Method and system for stabilizing reflected light - Google Patents
... stabilizing reflected light into a substantially even spatial distribution of light energy with a substantially uniform light ... The method and system for stabilizing reflected light can also enhance the drug development process by providing real-time in- ... The stabilization and substantially even spatial distribution of reflected light also can be accomplished by a single, integral ... The stabilization and substantially even spatial distribution of reflected light can be accomplished by mixing and transmitting ...http://www.google.com/patents/US6580935?dq=5708422
OSA | Laser Applications to Chemical, Security and Environmental Analysis 2018
Reduction of Visual Discomfort in HMD using Image Refocusing linked to Depth Control ... Development of a Background-Free, Broadband Absorption Method using Ultrafast Lasers: Time-Resolved Optically Gated Absorption ... High-Sensitivity Measurement of Environmental NO2 by Laser Photoacoustic Spectroscopy. Gaoxuan Wang, Hongming Yi, Eric Fertein ... Towards Perception-Inspired Numerical Measures of Compression Error in Digital Holograms of Natural Three-Dimensional Scenes ...https://www.osapublishing.org/conference.cfm?meetingid=23&yr=2018
Sensors | Free Full-Text | Multi-Wave and Hybrid Imaging Techniques: A New Direction for Nondestructive Testing and Structural...
... which means that the absorption of light causes a periodic heating and, hence, the thermal gradient in the medium causes ... Conversely, if the penetration depth of the eddy current is much smaller than the depth of the crack, the edge of the crack is ... In addition, Cheng et al. achieve an enhanced MOI system by using a laser to improve the sensitivity and image resolution in ... Nirmala, D.; Vignesh, R.; Vaidehi, V. Multimodal Image Fusion in Visual Sensor Networks. Proceedings of International ...http://www.mdpi.com/1424-8220/13/12/16146/htm
Patent US8077328 - Variable color incoherent alignment line and cross-hair generator - Google Patents
The low divergence light beam is directed to the mirror rod that reflects the light beam to the second convex lens that focuses ... The incoherent light source emits incoherent light that is received by the first convex lens that produces a low divergence ... the light beam to a convergent light beam. ... An alignment device includes an incoherent light source, a ... Based upon technological convention and the trichromatism of human visual perception, the light source 80 includes individual ...http://www.google.com/patents/US8077328?dq=552685
Frontiers | Toward a Wireless Open Source Instrument: Functional Near-infrared Spectroscopy in Mobile Neuroergonomics and BCI...
It provides features such as scalable channel number, configurable regulated light intensities, programmable gain and lock-in ... It provides features such as scalable channel number, configurable regulated light intensities, programmable gain and lock-in ... sensitivity and light penetration depth together with easy and robust, adaptive fixation of the optodes (see Figure 4). Based ... 2014). Hybrid fnirs-eeg based classification of auditory and visual perception processes. Front. Neurosci. 8:373. doi: 10.3389/ ...https://www.frontiersin.org/articles/10.3389/fnhum.2015.00617/full
Center for Visual Science : University of Rochester
However, due to significant loss of visible light from scattering and absorption by tissue, single photon optogenetic ... But when a visual stimulus offers no task-relevant information to integrate, can it still affect auditory perception? In this ... Despite a long history of studying the sensitivity of single neurons, little is known about how direction is read out from the ... Fiber optic two-photon optogenetic stimulation (FO-TPOS) was used in order to enhance the in-depth stimulation. Various ...http://cvs.rochester.edu/events/index.html
JoVE | Peer Reviewed Scientific Video Journal - Methods and Protocols
... minimal light absorption and scattering, while still permitting deep tissue imaging.. Environmental Sciences, Issue 91, Serial ... categorical perception, virtual reality, avatar, human likeness, Mori, uncanny valley hypothesis, perception, magnetic ... Resolution is improved, with typical lateral and axial resolutions of 110 and 280 nm, respectively and depth of sampling of up ... These measurements are all linear and correlate with the number of cells plated, but vary in sensitivity. All three assays ...https://www.jove.com/visualize/abstract/25668192/what-actually-confers-adaptive-capacity-insights-from-agro-climatic
The role of nocturnal vision in mate choice: females prefer conspicuous males in the European tree frog (Hyla arborea) |...
1956 Selective light absorption by the lenses of lower vertebrates, and its influence on spectral sensitivity. Biol. Bull. 111 ... We adjusted video colours to match the frogs' visual perception, a crucial aspect not considered in previous experiments. ... Second, the lack of depth cues, which is typical of videos, may have influenced female behaviour by increasing male search, ... This result is in agreement with previous findings on visual sensitivity. Female visual sensitivity varies with female ...http://rspb.royalsocietypublishing.org/content/276/1666/2351