Results 11 to 20 of about 1,757,364 (306)

Noise provides new insights on contrast sensitivity function. [PDF]

PLoS ONE, 2014
Sensitivity to luminance difference, or contrast sensitivity, is critical for animals to survive in and interact with the external world. The contrast sensitivity function (CSF), which measures visual sensitivity to spatial patterns over a wide range of ...
Ge Chen, Fang Hou, Fang-Fang Yan, Pan Zhang, Jie Xi, Yifeng Zhou, Zhong-Lin Lu, Chang-Bing Huang   +7 more
doaj   +2 more sources

Correlation between contrast sensitivity and higher-order aberration based on pupil diameter after cataract surgery

Clinical Ophthalmology, 2011
Takefumi Yamaguchi1,2, Kazuno Negishi1, Kazuhiko Ohnuma3, Kazuo Tsubota11Department of Ophthalmology, Keio University School of Medicine, Tokyo; 2Department of Ophthalmology, Ichikawa General Hospital, Tokyo Dental College, Chiba; 3Department of Medical ...
Yamaguchi T, Negishi K, Ohnuma K, Tsubota K   +3 more
doaj   +3 more sources

Visual acuity and contrast sensitivity of adult zebrafish [PDF]

Frontiers in Zoology, 2012
Background The aim of this study was to evaluate the visual acuity of adult zebrafish by assessing the optokinetic reflex. Using a modified commercially available optomotor device (OptoMotry®), virtual three-dimensional gratings of variable spatial ...
Tappeiner Christoph, Gerber Simon, Enzmann Volker, Balmer Jasmin, Jazwinska Anna, Tschopp Markus   +5 more
doaj   +2 more sources

Short-Term Peripheral Contrast Reduction Affects Central Chromatic and Achromatic Contrast Sensitivity

Photonics, 2022
Peripheral retinal contrast reduction is suggested as a potential myopia control strategy. However, the underlying mechanism is yet unknown. Therefore, this study investigated the influence of peripheral contrast reduction on central chromatic and ...
Antonia Neumann, Alexander Leube, Najma Nabawi, Yannick Sauer, Peter Essig, Katharina Breher, Siegfried Wahl   +6 more
doaj   +1 more source

Effects of Different Contact Lens Designs on Visual Quality Among the Soft Spherical Contact Lens Users

Türk Oftalmoloji Dergisi, 2013
Purpose: To evaluate the effects of different lens designs on visual quality among soft spherical contact lens users. Material and Method: Forty eyes of twenty patients from our contact lens unit were included in this study.
Mustafa Demir, Sevda Aydın Kurna, Tomris Şengö   +2 more
doaj   +1 more source

Contrast sensitivity and discrimination in pictorial images [PDF]

, 2014
This paper describes continuing research concerned with the measurement and modeling of human spatial contrast sensitivity and discrimination functions, using complex pictorial stimuli.
Gupta, G., Triantaphillidou, S., Jarvis, J.   +2 more
core   +1 more source

Measuring contrast sensitivity

Vision Research, 2013
Contrast sensitivity defines the threshold between the visible and invisible, which has obvious significance for basic and clinical vision science. Fechner's 1860 review reported that threshold contrast is 1% for a remarkably wide range of targets and conditions.
Pelli, Denis G., Bex, Peter
openaire   +2 more sources

Binocular summation of contrast remains intact in strabismic amblyopia [PDF]

, 2007
PURPOSE. Strabismic amblyopia is typically associated with several visual deficits, including loss of contrast sensitivity in the amblyopic eye and abnormal binocular vision.
Meese, Tim S., Hess, Robert F., Meese, Timothy S., Mansouri, Behzad, Baker, Daniel H.   +4 more
core   +1 more source

Digital contrast sensitivity chart with varying visual acuity: Development and validation

Oman Journal of Ophthalmology, 2023
BACKGROUND: Contrast sensitivity (CS) evaluation is very much necessary for the diagnosis and management of eye conditions. Several disadvantages seen in the traditionally used Pelli-Robson (PR) chart persuaded us to develop a novel digital device for ...
Prateeksha G Hegde, Diwakar Rao, B Prudhvi, Namratha Hegde   +3 more
doaj   +1 more source

Contrast sensitivity in images of natural scenes [PDF]

, 2019
The contrast sensitivity function (CSF) characterizes spatial detection in the human visual system and is typically measured from simple, synthetic stimuli.
Gupta, G., Triantaphillidou, S., Psarrou, A., Jarvis, J.   +3 more
core   +1 more source