Results 21 to 30 of about 1,757,364 (306)

The contrast sensitivity of the cat

open access: yesThe Journal of Physiology, 1973
1. The experiments were carried out on pretrigeminal cats.2. By recording potentials evoked from the visual cortex by a grating stimulus, it was established that there was a linear relation between the voltage generated and the logarithm of the contrast of the grating.3.
CAMPBELL FW, MAFFEI L, PICCOLINO, Marco
openaire   +4 more sources

On the decline of 1st and 2nd order sensitivity with eccentricity [PDF]

open access: yes, 2008
We studied the relationship between the decline in sensitivity that occurs with eccentricity for stimuli of different spatial scale defined by either luminance (LM) or contrast (CM) modulation.
Wang, Jian   +3 more
core   +1 more source

Contrast sensitivity in β-thalassemic patients

open access: yesJournal of the Egyptian Ophthalmological Society, 2015
Aim of work This work aimed to diagnose any abnormalities in contrast sensitivity and retinal functions in β-thalassemic patients. Patients and methods Thirty patients diagnosed with b-thalassemia were included in this study.
Tamer H El-Sersy, Heba W El-Saed
doaj   +1 more source

Psychophysical aspects of contrast sensitivity

open access: yesAfrican Vision and Eye Health, 2013
This paper reviews the psychophysical aspects of contrast sensitivity which concerns components of visual stimuli and the behavioural responses and methods used in contrast sensitivity testing.
Anusha Y. Sukha, Alan Rubin
doaj   +1 more source

Hyperbaric Oxygen Effects on Contrast and Macular Light Sensitivity in Dry Type Age-Related Macular Degeneration Patients

open access: yesFolia Medica Indonesiana, 2021
This study was to compare the effectiveness of hyperbaric oxygen therapy (HBOT) on contrast and macular light sensitivity improvement in dry type age-related macular degeneration (AMD) patients.
Indriani Kartika Dewi   +2 more
doaj   +1 more source

Comparison of the outcome of partial time occlusion therapy in strabismic versus anisometropic moderate amblyopes

open access: yesJournal of the Egyptian Ophthalmological Society, 2022
Background Early in life, selective visual input disruption to one eye compromises most of the visual aspects, resulting in amblyopia, with a great social and economic effect.
Momen M Hamdi   +3 more
doaj   +1 more source

Active Learning to Characterize the Full Contrast Sensitivity Function in Cataracts

open access: yesClinical Ophthalmology, 2022
Filippos Vingopoulos,1,2 Megan Kasetty,1 Itika Garg,1,2 Rebecca F Silverman,1 Raviv Katz,1,2 Ryan A Vasan,3 Alice C Lorch,3 Zhonghui K Luo,3 John B Miller1,2 1Harvard Retinal Imaging Lab, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA;
Vingopoulos F   +8 more
doaj  

Image quality optimization, via application of contextual contrast sensitivity and discrimination functions [PDF]

open access: yes, 2015
What is the best luminance contrast weighting-function for image quality optimization? Traditionally measured contrast sensitivity functions (CSFs), have been often used as weighting-functions in image quality and difference metrics. Such weightings have
Fry, E.   +7 more
core   +1 more source

Contrast sensitivity abnormalities in deaf individuals

open access: yesJournal of Ophthalmic & Vision Research, 2018
Purpose: Hearing impaired children are heavily dependent on their sense of vision to develop efficient communication skills; any contrast sensitivity defect can negatively impact their lives because they are not able to use auditory stimuli to recognize ...
Masoud Khorrami-Nejad   +3 more
doaj   +1 more source

R_Contrast: Rapid measurement of recognition contrast thresholds. [PDF]

open access: yes, 1997
R_Contrast is a program for the rapid assessment of recognition contrast thresholds on the ...
Strasburger, Hans, Hans Strasburger
core   +1 more source

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