Results 81 to 90 of about 3,445,002 (192)

Contrast Sensitivity and Asthenopia Analysis in Workers

Acta Medica Bulgarica
In the digital age, complaints of eyestrain, or asthenopia, have become increasingly common. This condition is often associated with prolonged near-work activities, such as extended use of computers or digital devices, with reported prevalence rates ...
Amalia H., Adiwardhani A., Devita A., Pratiwi M., Witjaksana R., Dewi A., Yousif E.   +6 more
doaj   +1 more source

Contrast visual acuity in patients with retinitis pigmentosa assessed by a contrast sensitivity tester

Indian Journal of Ophthalmology, 2012
Purpose: To assess contrast visual acuity (CVA) in patients with retinitis pigmentosa (RP) and compare the result with standard visual acuity (VA), retinal thickness, status of inner segment/outer segment junction, and central visual field. Materials and
Maho Oishi, Hajime Nakamura, Masanori Hangai, Akio Oishi, Atsushi Otani, Nagahisa Yoshimura   +5 more
doaj   +1 more source

Alterations in center-surround contrast suppression in patients with major depressive disorder

Scientific Reports
Previous pattern electroretinogram studies indicate reduced retinal contrast gain in patients with a major depressive disorder (MDD) which may contribute to alterations in visual perception.
Kathrin Nickel, Sven P. Heinrich, Malina Beringer, Dominique Endres, Kimon Runge, Sebastian Küchlin, Simon Maier, Michael Bach, Katharina Domschke, Ludger Tebartz van Elst, Evelyn B. N. Friedel   +10 more
doaj   +1 more source

Contrast Sensitivity in Microtropic and Anisometropic Eyes of Successfully Treated Amblyopes

Türk Oftalmoloji Dergisi, 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.
Özlem Öner, Sezin Akça Bayar, Sibel Oto, Onur Gökmen, Mustafa Agah Tekindal   +4 more
doaj   +1 more source

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  

Evaluation of visual acuity and contrast sensitivity in early cataract

مجله دانشگاه علوم پزشکی گرگان, 2021
Background and Objective: Age-related cataract is one of the most important causes of blindness. Early detection of cataracts can help alleviate the problems caused by this disease.
Monireh Mahjoob, Farkhonde Shahri
doaj  

Visual Effects of Logo on the Attentional Filter and Perception [PDF]

, 2017
The purpose of this project is to understand the effects of different logo design elements (i.e. spatial frequency, contrast sensitivity, and colour) to assess their effectiveness at gaining the attention of consumers.
Machado, Joana, Murphy, Dana, Nadeau, John, Ulrich, Tess, Vacas de Carvalho, Leonor, Wachowiak, Mark   +5 more
core   +1 more source

Effect of Fasting on Contrast Sensitivity in Healthy Males

Journal of Ophthalmic & Vision Research, 2019
Purpose: To evaluate the effect of fasting on contrast sensitivity (CS) in healthy male individuals during the month of Ramadan. Methods: This study included 45 healthy male individuals, aged between 20 and 40 years, working in the same environment.
Zarife Ekici Gok, Abuzer Gunduz, Cem Cankaya   +2 more
doaj   +1 more source

Uniform apparent contrast noise: A picture of the noise of the visual contrast detection system [PDF]

A picture which is a sample of random contrast noise is generated. The noise amplitude spectrum in each region of the picture is inversely proportional to spatial frequency contrast sensitivity for that region, assuming the observer fixates the center of
Ahumada, A. J., Jr., Watson, A. B.
core   +1 more source

Contrast sensitivity study in patients with Anisometropia Amblyopia

Journal of the Egyptian Ophthalmological Society
Background Contrast sensitivity is the ability of the eye to detect small changes in illumination at targets that do not have clearly defined limits. Amblyopia is a disorder of sight in which the brain fails to process inputs from one eye and over time ...
Dina A. El Salmawy, Reem Elhadidy, Eman Ashraf, Asmaa Shuaib, Mona M. Nada   +4 more
doaj   +1 more source