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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
semanticscholar   +5 more sources

Contrast sensitivity functions in autoencoders [PDF]

Journal of Vision, 2022
Three decades ago, Atick et al. suggested that human frequency sensitivity may emerge from the enhancement required for a more efficient analysis of retinal images. Here we reassess the relevance of low-level vision tasks in the explanation of the Contrast Sensitivity Functions (CSFs) in light of (1) the current trend of using artificial neural ...
Li, Qiang, Gomez-Villa, Alex, Bertalmío, Marcelo, Malo, Jesús   +3 more
openaire   +7 more sources

Comparison of Spaeth/Richman Contrast Sensitivity and Pelli-Robson Tests for Assessing Contrast Sensitivity in Patients with Glaucoma [PDF]

Journal of Ophthalmic & Vision Research
Purpose: To determine the optimal cut-offs for Pelli-Robson (PR) and Spaeth/Richman contrast sensitivity (SPARCS) test scores for diagnosing glaucoma and to compare PR and SPARCS scores (total and individual quadrants) for assessing contrast sensitivity
Fatema Noble, Suhas Haldipurkar, Vijay Shetty, Tanvi Haldipurkar, Rita Dhamankar, Devendra Venkatramani, Shreyas Dhamorikar, Sarita Deshpande, Maninder Singh Setia   +8 more
doaj   +2 more sources

Contrast sensitivity and higher-order aberrations in Keratoconus subjects

Scientific Reports, 2021
This study analyzes the relationship between contrast-sensitivity and higher-order aberrations (HOA) in mild and subclinical-keratoconus in subjects with good visual-acuity (VA).
Einat Shneor, David P. Piñero, Ravid Doron   +2 more
doaj   +2 more sources

Psychophysical aspects of contrast sensitivity

African 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   +3 more sources

Assessment of central and peripheral contrast sensitivity in myopes using Spaeth/Richman contrast sensitivity [PDF]

Oman Journal of Ophthalmology
BACKGROUND: Assessing central and peripheral contrast sensitivity (CS) in myopic patients with varying degrees of refractive error using Spaeth/Richman contrast sensitivity test (SPARCS) and compared it with emmetropic individuals. MATERIALS AND METHODS:
Parul Ichhpujani, Uday Pratap Singh Parmar, Rohan Bir Singh, Suresh Kumar   +3 more
doaj   +2 more sources

Contrast Sensitivity and Glaucoma

Journal of Glaucoma, 2019
Spatial contrast sensitivity decline occurs in different types and stages of glaucoma. In this short review we discuss methods of assessing contrast sensitivity, the role of contrast sensitivity in the pathogenesis of glaucoma and its practical application in clinical practice.
Parul, Ichhpujani, Sahil, Thakur, George L, Spaeth   +2 more
openaire   +3 more sources

Effects of COVID-19 on the contrast sensitivity [PDF]

Brazilian Journal of Medical and Biological Research
There are significant gaps in understanding the extent of the damage caused by COVID-19, with few publications examining its link to contrast sensitivity function (CSF).
G.M. Silva, J.J.S Souto, T. Fernandes, G.S. Souza, M.J.O. de Andrade, N.A. dos Santos   +5 more
doaj   +2 more sources

Visual acuity and contrast sensitivity of adult zebrafish

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

Effect of astigmatism and spherical equivalent correction on contrast sensitivity [PDF]

International Journal of Ophthalmology
AIM: To investigate the effect of astigmatism and spherical equivalent (SE) correction on contrast sensitivity (CS). METHODS: In this cross-sectional study, 103 visually normal subjects aged 18 to 36y with bilateral regular astigmatism in range of 1.00 ...
Maryam Saffarizadeh, Saeed Rahmani, Alireza Akbarzadeh Baghban, Mohammad Ghassemi-Broumand   +3 more
doaj   +2 more sources