Results 231 to 240 of about 578,628 (285)

Investigating Visual Perception of Degree Centrality in Graph Visualization

IEEE Transactions on Visualization and Computer Graphics
Degree centrality (DC) is a widely used metric that measures node importance in data space. A node-link diagram is a commonly used graph visualization to help viewers identify important nodes in visual space. Previous graph perception studies largely concentrated on revealing perception principles in visual space.
Ying Zhao, Fangfang Zhou, Xin Zhao
exaly   +3 more sources

The screening of the central visual field

Albrecht von Graefes Archiv f�r Klinische und Experimentelle Ophthalmologie, 1975
The Armaly technique, a method of screening for glaucomatous field defects was evaluated in 100 normal eyes and 38 selected central field defects using the Goldmann perimeter and the Auto-Plot tangent screen. The screening results obtained from the Goldmann perimeter and the tangent screen using the selective perimetry of Armaly were compared with the ...
G K, Krieglstein, K, Andrae
openaire   +2 more sources

Central Visual Field Contributions to the Visual-Evoked Response

Optometry and Vision Science, 1980
Abstract Visual evoked responses (VER) were recorded from bipolar electrodes placed transversely across the occipital region. A series of apertures were used to block the stimulation of the foveal area. The transverse distribution of the C2 component of the VER corresponds to a radial dipole source, and this is consistent with a ...
J R, Vance, R, Jones
openaire   +2 more sources

Visual Illusions: Peripheral or Central?

Nature, 1968
ALTHOUGH visual illusions have been studied experimentally for more than 100 years, there is still controversy about their explanation. Some authors claim that most geometrical illusions are caused by peripheral factors such as retinal mechanisms. Ganz1, for example, suggests that those illusions involving intersecting lines (Zollner, Poggendorff and ...
openaire   +2 more sources

The Visual-evoked Response in Infants With Central Visual Impairment

American Journal of Ophthalmology, 1993
We studied ten children with central visual impairment with a known neurologic defect and an abnormal visual-evoked response who had results of repeat electrophysiologic testing evaluated at the Children's Hospital of Philadelphia from December 1989 through July 1991.
D B, Granet, R W, Hertle, G E, Quinn, M E, Breton   +3 more
openaire   +2 more sources

Visualizing the central tendency of ensembles of shapes

SIGGRAPH ASIA 2016 Symposium on Visualization, 2016
We propose a new approach for analyzing the central tendency (centrality) of an ensemble of shapes in 2D or 3D space. Our approach provides means to determine the most central shape from a given set of shapes, to quantify the region-wise centrality of the shapes, and to compute a locally most representative shape.
Ismail Demir, Mihaela Jarema, Rüdiger Westermann   +2 more
openaire   +2 more sources

Central visual dysfunction with disc swelling

Survey of Ophthalmology, 1981
A healthy 17-year-old white male suffered sudden painless onset of visual loss in the right eye. The affected eye had a cecocentral scotoma, marked disc swelling with hyperemia and flame-shaped hemorrhages, and subretinal fluid extending into the macular area.
R M, Burde, J L, Keltner, N R, Miller, J W, Gittinger   +3 more
openaire   +2 more sources

The determination of the central static visual acuity

Documenta Ophthalmologica, 1992
In identical experimental situations we tested 22 adults with our proposed Landolt C wall-chart and the so-called TNO Landolt-C chart. Contrary to theoretical expectations, it appeared that there was only a slight difference in the measured visual acuities. Further study will show whether this is an incidental or a structural occurrence.
G H, Jonkers, H, Bank, J, Burger
openaire   +2 more sources

THE CENTRAL VISUAL SYSTEM

Archives of Neurology & Psychiatry, 1939
It has been consistently demonstrated that unilateral occipital lobectomies in man result in homonymous hemianopia with sparing of central vision. 1 This has also been my experience in 5 cases of occipital lobectomy. It has also been adequately demonstrated that lesions which destroy the posterior aspect of the temporal lobe down to the temporal horn ...
openaire   +1 more source

Central Field Index Versus Visual Field Index for Central Visual Function in Stable Glaucoma

Journal of Glaucoma, 2017
Objective: To compare the variability of central field index (CFI) versus visual field index (VFI) in stable glaucoma with central fixation involvement. Materials and Methods: For this retrospective study, we identified multiple visual fields (VFs) of patients with repeatable ...
Aparna, Rao, Debananda, Padhy, Harika, Mudunuri, Avik K, Roy, Sarada P, Sarangi, Gopinath, Das   +5 more
openaire   +2 more sources