Results 61 to 70 of about 1,757,364 (306)

Comparing Visual Acuity, Low Contrast Acuity and Contrast Sensitivity After Trifocal Toric and Extended Depth of Focus Toric Intraocular Lens Implantation

Clinical Ophthalmology, 2020
Kjell G Gundersen,1 Rick Potvin2 1IFocus Øyeklinikk AS, Haugesund, Norway; 2Science in Vision, Akron, NY, USACorrespondence: Kjell G GundersenIFocus Øyeklinikk AS, Haugesund 5527, NorwayTel +47 5808900Email kg@ifocus.noPurpose: The aim&
Gundersen KG, Potvin R
doaj  

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Factors Affecting Contrast Sensitivity in Healthy Individuals: A Pilot Study

, 2017
Objectives: To determine the demographic and ocular features affecting contrast sensitivity levels in healthy individuals. Materials and Methods: Seventy-four eyes of 37 subjects (7-65 years old) with refractive errors less than 1.0 diopter, no history ...
Karatepe, Arzu Seyhan, Sait Eğrilmez, Kose, Suheyla, Süheyla Köse, Egrilmez, Sait, Arzu Seyhan Karatepe   +5 more
core   +1 more source

Binocular contrast vision at and above threshold [PDF]

, 2006
A fundamental problem for any visual system with binocular overlap is the combination of information from the two eyes. Electrophysiology shows that binocular integration of luminance contrast occurs early in visual cortex, but a specific systems ...
Georgeson, Mark A., Meese, Tim S., Meese, Timothy S., D. H. Baker, T. S. Meese, M. A. Georgeson, Baker, Daniel H.   +6 more
core   +1 more source

The Measurement of Contrast Sensitivity in Near Vision: The Use of a Digital System vs. a Conventional Printed Test

Technologies
In recent years, there has been intense development of digital diagnostic tests for vision. All of these tests must be validated for clinical use.
Kevin J. Mena-Guevara, David P. Piñero, María José Luque, Dolores de Fez   +3 more
doaj   +1 more source

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

Peeling Plaids Apart: Context Counteracts Cross-Orientation Contrast Masking

, 2009
Background: Contrast discrimination for an image is usually harder if another image is superimposed on top. We asked whether such contrast masking may be enhanced or relieved depending on cues promoting integration of both images as a single pattern ...
Verghese, P., Preeti Verghese, Freeman, E, Verghese, P, Freeman, E. D., Elliot Freeman   +5 more
core   +1 more source

Evaluation of contrast sensitivity in visually impaired individuals using K-CS test. A novel smartphone-based contrast sensitivity test-Design and validation.

PLoS ONE
BackgroundTo describe the development and investigate the accuracy of a novel smartphone-based Contrast Sensitivity (CS) application, the K-CS test.MethodsA total of 67 visually impaired and 50 normal participants were examined monocularly using the ...
Vasileios Karampatakis, Eleni P Papadopoulou, Stavroula Almpanidou, Leonidas Karamitopoulos, Diamantis Almaliotis   +4 more
doaj   +3 more sources

Contrast sensitivity in patients with diabetes mellitus [PDF]

Medicinski Podmladak, 2018
Introduction: Diabetic retinopathy is one of the major complications of diabetes mellitus. It is a progressive disease that includes following stages: no apparent DR, non-proliferative DR and proliferative DR.
Mirković Jelena, Risimić Dijana
doaj  

An isoform of 14‐3‐3 protein regulates transbilayer lipid movement at the plasma membrane

FEBS Letters, EarlyView.
Loss of 14‐3‐3ζ in CHO cells confers resistance to exogenous phosphatidylserine (PS) and impairs endocytosis‐independent inward flip‐flop of fluorescent PS at the plasma membrane. RNAi‐mediated knockdown reproduces this defect, while no additive effect is seen in ATP11C‐deficient cells.
Akiko Yamaji‐Hasegawa, Akira Hattori, Masafumi Tsujimoto, Toshihide Kobayashi   +3 more
wiley   +1 more source