Related Experiment Video
Updated: Sep 6, 2025

Visualizing Visual Adaptation
Published on: April 24, 2017
Impact of Color and Polarity on Visual Resolution with Varying Contrast Ratios and Different Text Backgrounds
Ai-Hong Chen1, Nurulain Muhamad1
1Optometry, Faculty of Health Sciences, Universiti Teknologi MARA, Cawangan Selangor, Kampus Puncak Alam, Malaysia.
Purpose:
To assess the impact of color and polarity in predicting the changes of visual resolution for different text backgrounds with increasing contrast ratios.
Methods:
Text-background designs of eight contrast ratios (0.15, 0.30, 0.47, 0.52, 0.57, 0.60, 0.70, and 0.78) and two text polarities (positive; black text and negative; white text) were compared with and without the presence of background color (blue, green, orange, and red). The visual resolution was measured in logMAR using Landolt C. The rate of changes in visual resolution measurements was analyzed using linear regression as contrast ratios increased with and without background color.
Results:
Visual resolution varied significantly with and without the background color element under both polarity investigations (P 0.05). Contrast ratio accounts for 77.4% of the variation within the visual resolution measurement with a color background [F = 20.76, P 0.01]. Contrast ratio accounts for 97.16% of the variation in visual resolution measurements without a color background [F = 205.63, P 0.01].
Conclusion:
As contrast decreases, color plays a more significant role than the non-color factor in the resolution of fine details in both polarities as it influences the visual resolution outcome which is reflected in the measurements in logMAR units.
More Related Videos
07:09Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions
Published on: May 2, 2019
06:50Enabling High Grayscale Resolution Displays and Accurate Response Time Measurements on Conventional Computers
Published on: February 29, 2012
Related Concept Videos
Color Vision
Chromatographic Resolution
The effectiveness of separation can be evaluated by determining the level of separation between two neighboring peaks in a chromatogram, which represents the individual components of a sample.
In chromatography,...
Anatomy of the Eyeball
Difference from Background: Limit of Detection
The LOD indicates the presence or absence...
Potential Due to a Polarized Object
Phase Contrast and Differential Interference Contrast Microscopy
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...