scholarly journals Excessive Crossed Disparity Detection by Visual Evoked Potentials to Reduce Visual Discomfort in 3D Viewing

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Xiao Wang ◽  
Liuye Yao ◽  
Zhiyu Qian ◽  
Lidong Xing ◽  
Weitao Li ◽  
...  
Keyword(s):  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Experimental System ◽  
Occipital Lobe ◽  
Cost Effective ◽  
Subjective Assessment ◽  
Classification Model ◽  
Visual Discomfort ◽  
Linear Discriminant ◽  
Visual Evoked

As excessive crossed disparity is known to cause visual discomfort, this study aims to establish a classification model to discriminate excessive crossed disparity in stereoscopic viewing in combination with subjective assessment of visual discomfort. A stereo-visual evoked potentials (VEPs) experimental system was built up to obtain the VEPs evoked by stereoscopic stimulus with different disparities. Ten volunteers participated in this experiment, and forty VEP datasets in total were extracted when the viewers were under comfortable viewing conditions. Six features of VEPs from three electrodes at the occipital lobe were chosen, and the classification was established using the Fisher’s linear discriminant (FLD). Based on FLD results, the correct rate for determining the excessive crossed disparity was 70%, and it reached 80% for other stimuli. The study demonstrated cost-effective discriminant classification modelling to distinguish the stimulus with excessive crossed disparity which inclines to cause visual discomfort.

scholarly journals Ishihara's Tests for Color Blindness: A useful Indicator of Visual Involvement in Multiple Sclerosis

2000 ◽  
Vol 2 (1) ◽  
pp. 6-13
Author(s):  
MD Kaufman ◽  
DM Lutz ◽  
J Norton
Keyword(s):  
Multiple Sclerosis ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Cost Effective ◽  
Color Blindness ◽  
Bedside Test ◽  
History Of ◽  
Multiple Sclerosis Patients ◽  
Effective Adjunct ◽  
Visual Evoked

Abstract Because vision commonly is affected in persons with multiple sclerosis, it would be helpful to have a bedside test capable of identifying abnormalities that are not readily apparent. This study evaluated the sensitivity and specificity of the first 11 plates of Ishihara's Tests for color blindness (1995 concise edition) as compared to visual evoked potentials in patients with multiple sclerosis reporting normal vision. Forty-five multiple sclerosis patients and 42 controls, aged 25 to 44 years, were assessed. After examination of vision by a neurologist, Ishihara's Tests for color blindness and visual evoked potential tests were administered under conditions similar to those encountered in a neurologic practice. The specificity for each test was defined by the responses of the control population. In differentiating individuals with multiple sclerosis from controls, Ishihara's Tests for color blindness was as sensitive (62%; 28/45) and specific (100%; 42/42) as visual evoked potentials (sensitivity = 58%, 26/45; specificity = 98%, 41/42). Ishihara's Tests for color blindness identified a different population of patients and probably measured a different aspect of visual function than did visual evoked potentials. Ishihara's Tests for color blindness appeared more likely to identify patients with a long disease duration, while visual evoked potentials better identified patients with a history of optic neuritis. Ishihara's Tests for color blindness may be a simple and cost-effective adjunct for detecting and following the visual abnormalities of patients with multiple sclerosis.

Visual evoked potentials in tumors from orbita to occipital lobe in childhood

1988 ◽  
Vol 11 (3-4) ◽  
pp. 279-286 ◽  
Author(s):  
Dieter Wenzel ◽  
Ulrich Brandl ◽  
Jörn-Dirk Beck ◽  
Cornelia Cedzich ◽  
Fritz Albert
Keyword(s):  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Occipital Lobe ◽  
Visual Evoked

Visual Evoked Potentials in Occipital Lobe Lesions

1981 ◽  
Vol 38 (2) ◽  
pp. 80-85 ◽  
Author(s):  
L. J. Streletz ◽  
S. H. Bae ◽  
R. M. Roeshman ◽  
N. J. Schatz ◽  
P. J. Savino
Keyword(s):  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Occipital Lobe ◽  
Visual Evoked
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