Results 41 to 50 of about 9,643,688 (148)

Effect of Contrast and Adaptation on the Perception of the Direction and Speed of Drifting Gratings [PDF]

open access: yes, 1994
Three experiments were conducted to analyse the effect of contrast and adaptation state on the ability of human observers to discriminate the motion of drifting gratings.
Müller, Rolf   +2 more
core   +1 more source

Contrast-Sensitivity Function and Photo Stress–Recovery Time in Prediabetes

open access: yesClinical Optometry, 2020
Prema K Chande,1 Rajiv Raman,2 Preethi John,3 Sangeetha Srinivasan4 1Chitkara School of Health Sciences and Lotus College of Optometry, Mumbai, India; 2Sankara Nethralaya, Medical Research Foundation, Chennai, India; 3Chitkara School of Health Sciences ...
Chande PK, Raman R, John P, Srinivasan S
doaj  

Binocular interaction: contrast matching and contrast discrimination are predicted by the same model [PDF]

open access: yes, 2007
How do signals from the 2 eyes combine and interact? Our recent work has challenged earlier schemes in which monocular contrast signals are subject to square-law transduction followed by summation across eyes and binocular gain control.
Tim S. Meese   +11 more
core   +1 more source

Higher-harmonic adaptation and the detection of squarewave gratings [PDF]

open access: yes, 1987
Adaptation to a high contrast sinewave grating of 1 c/deg spatial frequency causes a large increase in the contrast threshold for a 1 c/deg test grating, but fails to raise the threshold for a squarewave grating of 0.33 c/deg, although the sensitivity of
Magnussen, S.   +3 more
core   +1 more source

Contrast sensitivity and the Stiles–Crawford effect [PDF]

open access: yes, 2002
We investigated the influence of the Stiles–Crawford effect (SCE) of the first kind on the contrast sensitivity function using the apodisation model of the SCE.
Scott, Dion H.   +3 more
core   +1 more source

Improvement or worsening of human contrast sensitivity due to blue light attenuation at 450 nm [PDF]

open access: yes, 2020
Purpose: The work was aimed at comparing contrast sensitivity performance in an indoor environment with two filters, which differ only in the presence of a band at 450±20 nm in the transmittance spectrum.
Larcher, Silvano   +6 more
core   +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

Contrast Sensitivity in Microtropic and Anisometropic Eyes of Successfully Treated Amblyopes [PDF]

open access: yes, 2017
Objectives: To assess and compare contrast sensitivity function in the previously amblyopic and non-amblyopic “normal” eyes of patients with microtropia and anisometropia who achieved 20/20 visual acuity after occlusion therapy.
Bayar, Sezin Akca   +9 more
core   +1 more source

Association Between Cataract and Visual Function in Elderly Patients at Rethabile Health Centre in Capricorn District, Limpopo Province, South Africa

open access: yesProceedings
Background: Owing to aging, the human eye goes through changes, which include theloss of transparency of the crystalline lens, a clear structure inside the eye that is responsiblefor clarity of vision by focusing light rays onto the retina. [...]
Makombela Moses Moshe   +2 more
doaj   +1 more source

Effect of the color of the intraocular lens on optical and visual quality

open access: yesIndian Journal of Ophthalmology, 2014
Purpose: To analyze the optical quality of intraocular lenses (IOL) with an orange (PC440Y) and a yellow (SN60AT) filter, and correlate these results with the visual quality of patients with these implants. Setting: Fisabio Oftalmologνa Mιdica, Valencia,
M Amparo Díez-Ajenjo   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy