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CorticalEvoked potentialsAcuteStructural lesionsContrastInteractionAdultsPatientsHuman visualLightReportSystemsPresentTimeSearchFactorsVisionImproveReviewDecreased visual acuityAbnormalCharacteristicsVariationRevealsOptic nervePrecedeStimuliOphthalmicLesionsColor visionColorsExaminationApparentBrightLightCommonIllnessBackgroundSystemOccasionallyPatientsTargetChangeAffectFunctionObjectCasesInclude
Cortical3
  • Precision-Tinted Spectral Filters Reduce TBI-Related Migraines and visual cortical sensitivity. (irlen.com)
  • The latter is manifested in hypersensitivity to visual stimuli, measured with questionnaires and sensory thresholds, as well as in abnormal cortical excitability and a lack of habituation, assessed with visual evoked potentials elicited by pattern-reversal stimulation. (biomedcentral.com)
  • Here, the goal was to determine whether factors such as age and/or disease severity may exert a modulatory influence on sensory sensitivity, cortical excitability, and habituation. (biomedcentral.com)
Evoked potentials5
  • Visual evoked potentials (VEPs) can be considered in patients in whom a diagnosis of ON is suspected. (medscape.com)
  • Visual evoked potentials may be abnormal even when visual acuity is normal and when MRI of the optic nerve reveals no abnormalities. (medscape.com)
  • Visual evoked potentials often show a loss of P100 response in the acute phase. (medscape.com)
  • We obtained pattern-reversal visual evoked potentials and calculated the N1-P1 Peak-to-Peak amplitude. (biomedcentral.com)
  • Visual evoked potentials (VEPs) are an important means of evaluating patients with suspected ON. (medscape.com)
Acute1
  • 18,19] Photophobia is one the most common symptoms in both acute and chronic phases of concussion. (researchgate.net)
Structural lesions1
  • Patients presented with visual field loss or cranial neuropathies require evaluation for structural lesions. (researchgate.net)
Contrast11
  • The Chubb illusion is an optical illusion or error in visual perception in which the apparent contrast of an object varies substantially to most viewers depending on its relative contrast to the field on which it is displayed. (wikipedia.org)
  • An object of low-contrast visual texture surrounded by a field of uniform visual texture appears to have higher contrast than when presented on a field of high-contrast texture. (wikipedia.org)
  • Chubb and his colleagues researched this illusion by showing various combinations of foreground objects and background fields to human test subjects and asking them to rate the sharpness of the visual contrast in each foreground object. (wikipedia.org)
  • They found that subjects viewing a patch of random visual texture embedded in a surrounding background field were likely to report different perceptions of visual contrast for the central target patch depending on the relative contrast of the background field. (wikipedia.org)
  • The Chubb illusion is similar to another visual illusion, the contrast effect. (wikipedia.org)
  • The contrast effect is an illusion in which the perceived brightness or luminance of an identical central visual target form on a larger uniform background varies to the test subject depending on the ratio of the central form's luminance to that of its background. (wikipedia.org)
  • The Chubb illusion illustrates an error in contrast rather than luminance. (wikipedia.org)
  • The zero-luminance background of Figure 2 (A) becomes a zero-contrast field in the analogous portion of Figure 1, while the high-luminance field of Figure 2 (B) becomes a high-contrast texture field. (wikipedia.org)
  • [ 1 ] although permanent residual deficits in color vision and contrast and brightness sensitivity are common. (medscape.com)
  • Abnormal contrast sensitivity and color vision are present in almost all adults with ON even in the absence of a measurable decrease in visual acuity. (medscape.com)
  • A gradual recovery of visual acuity with time is characteristic of ON,[22] although permanent residual deficits in color vision and contrast and brightness sensitivity are common. (medscape.com)
Interaction1
  • Visual perceptions are dependent on the interaction of the human visual system with any bi-stable or multi-stable stimuli and the frequency of its occurrence. (wikipedia.org)
Adults1
  • Effect of Induced Visual Fatigue on Sensory Ocular Dominance and the Effect of Colored Filters on the Levels of Visual Fatigue in Dyslexic Adults with MIS. (irlen.com)
Patients1
  • In both experiments, patients reported increased visual hypersensitivity on the Sensory Perception Quotient as compared to controls. (biomedcentral.com)
Human visual1
  • These visual illusions are of particular interest to researchers because they may provide valuable insights in regard to the workings of human visual systems. (wikipedia.org)
Light2
  • Light sensitivity and some pervasive developmental disorders: autistic disorder, Asperger's disorder. (irlen.com)
  • While light therapy applied in the daytime is known to have anti-depressive properties, excessive light exposure at night has been reportedly associated with depressive symptoms. (researchgate.net)
Report1
  • Visual stress symptoms secondary to stroke alleviated with spectral filters and precision tinted ophthalmic lenses: a case report. (irlen.com)
Systems2
  • Both afferent and efferent visual systems are sensitive to brain injury. (researchgate.net)
  • Current research topics include automatic image tagging, content-based image retrieval, metric learning, image understanding and sorting, and the development of visual image navigation systems. (mmm2023.no)
Present1
  • The present review focuses on the pathophysiology, clinical presentations, examinations, management, and future directions regarding visual disturbances after concussion. (researchgate.net)
Time1
  • This combination enables visual exploration of even the largest image collections in real time using a standard web browser. (mmm2023.no)
Search2
  • Use of visual search in the assessment of pattern-related visual stress (PRVS) and its alleviation by colored filters. (irlen.com)
  • pixolution's visual search technology is used by many image agencies. (mmm2023.no)
Factors1
  • The lighting of objects at a point, the reflectance of those objects and the transmittance of media between the object and observer is central to determining the primary factors that affect our visual perception. (wikipedia.org)
Vision1
  • Kai Barthel became professor of visual computing at HTW Berlin, where he teaches courses such as image analysis, machine learning, computer vision, and visual information retrieval. (mmm2023.no)
Improve2
  • Coloured overlays improve reading performance in people suffering from visual stress. (irlen.com)
  • Visual function begins to improve 1 to several weeks after onset, even without any treatment. (medscape.com)
Review1
  • Purpose of Review Concussion frequently results in visual symptoms, necessitating careful neuro-ophthalmic examination. (researchgate.net)
Decreased visual acuity2
Abnormal1
  • Visual evoked potentials may be abnormal even when visual acuity is normal and when MRI of the optic nerve reveals no abnormalities. (medscape.com)
Characteristics1
  • Display mapping is the specific tone mapping applied by the display based on its own characteristics - peak luminance, black level, color gamut, etc. - and based on content characteristics and/or metadata signaled in the bitstream. (getoto.net)
Variation2
  • Measurement of visual acuity reveals variation in reduction from no reduction to complete visual loss. (medscape.com)
  • The flicker could be reduced by about one-third when the FL41 tint was worn because the tint attenuated the short-wavelength light due to the gas discharge, reducing the continuous variation in brightness and colour. (touchneurology.com)
Reveals1
  • Rider A, Nishida S, & Johnston A: Multiple-stage ambiguity in motion perception reveals global computation of local motion directions, Journal of Vision, 16 (15):7, 1-11, 2016. (shitsukan.jp)
Optic nerve1
  • The damage may affect different locations along the visual pathway, from the optic nerve to the visual centres of the occipital lobes. (medicpdf.com)
Precede1
Stimuli2
  • Visual perceptions are dependent on the interaction of the human visual system with any bi-stable or multi-stable stimuli and the frequency of its occurrence. (wikipedia.org)
  • Hayashi R, Watanabe 0, Yokoyama H & Nishida S: A new analytical method for characterizing non-linear visual processes with stimuli of arbitrary distribution: theory and applications, Journal of Vision, 17(6):14, 1-20, 2017. (shitsukan.jp)
Ophthalmic1
  • Interpretation of the visual field (VF) is a key part of ophthalmic and neurological examinations. (medicpdf.com)
Lesions1
  • Beyond characterizing almost all pathological processes in the region, VF defects also help to locate the site of the lesion, as lesions interrupting the function of particular parts of the visual pathway cause specific defects. (medicpdf.com)
Color vision2
  • Patients with ON will all have at least mild subjective decreases in color vision and perception of brightness in the affected eye. (medscape.com)
  • The diagnosis of achromatopsia is established in a proband through clinical and family history, examination for nystagmus, visual acuity testing, color vision assessment, and fundoscopic examination. (nih.gov)
Colors1
  • High dynamic range ( HDR ) video brings a wider range of luminance and a wider gamut of colors, paving the way for a stunning viewing experience. (getoto.net)
Examination1
  • Thus, perimetric examination may indicate the site and extent of damage to the visual pathway. (medicpdf.com)
Apparent2
  • Furthermore, the apparent brightness/ dullness of a texture patch varied as the background varied. (wikipedia.org)
  • This apparent variance in perception is influenced when it is viewed by different observers and when the background and central target patch are placed on "non-overlapping spatial frequency bands", as explained by Chubb et al. (wikipedia.org)
Bright3
  • Although the two central target patches are equally bright (identical in luminance) the one on a dark background appears lighter and the one on a lighter background appears darker. (wikipedia.org)
  • Nystagmus develops during the first few weeks after birth followed by increased sensitivity to bright light. (nih.gov)
  • both nystagmus and sensitivity to bright light may improve slightly. (nih.gov)
Light5
  • The colorimeter illuminates text with coloured light and permits the colour, strength of colour and brightness to be manipulated separately. (touchneurology.com)
  • With this type of perimetry we measure differential light sensitivity for a stimulus presented against a constant background illumination. (medicpdf.com)
  • The threshold of this differential light sensitivity represents the brightness of the stimulus that is actually perceived. (medicpdf.com)
  • Thus, this method indicates retinal light sensitivity at predetermined locations in the VF. (medicpdf.com)
  • Achromatopsia is characterized by reduced visual acuity, pendular nystagmus, increased sensitivity to light (photophobia), a small central scotoma, eccentric fixation, and reduced or complete loss of color discrimination. (nih.gov)
Common1
  • 1 It is common in neurological diseases that involve the visual system, 2 of which migraine is the most prevalent. (touchneurology.com)
Illness1
  • NMOSD has recently been identified as a distinct autoimmune illness with more severe symptoms than MS and with a separate set of causes. (medscape.com)
Background2
  • I.e., the ratio of the top central rectangle's luminance (A) to its background field's luminance is greater than one. (wikipedia.org)
  • assert that the principle of lateral inhibition rests on the assumption that the determining factor of perceived lightness is the ratio, at the rectangle edge, of rectangle luminance to background luminance. (wikipedia.org)
System1
  • To find the measurement time required to obtain reasonable counts for image reconstruction, the most important parameter is the sensitivity of the system. (nih.gov)
Occasionally1
  • Symptoms of dyschromatopsia (change in color perception) in the affected eye may occasionally be more prominent than the decreased vision. (medscape.com)
Patients2
  • Visual evoked potentials (VEPs) can be considered in patients in whom a diagnosis of ON is suspected. (medscape.com)
  • In patients with autism, the perception of emotion in facial expression is improved. (touchneurology.com)
Target1
  • The luminance and the size of the target can be changed to plot different isopters. (medicpdf.com)
Change1
  • The extent of the involvement of the visual pathway may change during the progression of the pathological process. (medicpdf.com)
Affect1
  • The lighting of objects at a point, the reflectance of those objects and the transmittance of media between the object and observer is central to determining the primary factors that affect our visual perception. (wikipedia.org)
Function3
  • Visual function begins to improve 1 to several weeks after onset, even without any treatment. (medscape.com)
  • The importance of these methods is that the retinal function can be tested in detail, and minimal cooperation of the patient is sufficient to obtain objective data on the function of the retina, the visual pathway and the visual cortex. (medicpdf.com)
  • There are many methods to evaluate the function of the visual pathways (confrontation testing, Amsler test, kinetic and static perimetry). (medicpdf.com)
Object1
  • Kawabe T, Nishida S: Seeing jelly: judging elasticity of a transparent object, ACM Symposium on Applied Perception (SAP), 2016. (shitsukan.jp)
Cases1
  • In cases with concentric VF narrowing and generalised sensitivity disturbances the VF defect can be described according to alterations by retinal quadrants. (medicpdf.com)
Include1