Contrast is the difference in luminance or color that makes an object (or its representation in an image or display) visible against a background of different luminance or color. [1] .

2024年5月29日 · Contrast sensitivity is the ability to tell the difference between two similar colors or shades of gray. It helps you recognize an object as being separate from the background behind it....

2025年1月20日 · Contrast sensitivity is the ability to distinguish between an object and the background behind it. It differs from visual acuity, which measures the clarity of your vision at a distance. You can have excellent visual acuity but reduced contrast sensitivity and vice versa.

2021年5月17日 · Specific contrast sensitivity tests use letters, figures, lines, bars and dots in diminishing shades of gray to determine how well you can distinguish objects from their background. Some of the more common are the Pelli-Robson contrast sensitivity chart and the Mars Letter chart.

2023年6月11日 · Contrast sensitivity (CS) is the ability to perceive sharp and clear outlines of very small objects. It is also defined as the ability to identify minute differences in the shadings and patterns. CS helps detect objects without a clear outline and distinguish them from their background contrast.

2022年3月1日 · Visual acuity determines the sharpness and clarity of your vision from a distance. Contrast sensitivity refers to your ability to differentiate between an object and its background. Contrast sensitivity is also more sensitive than visual acuity, which makes monitoring it potentially more important. It can help doctors detect early signs and ...

2024年2月1日 · When a patient has low contrast sensitivity, it means they have difficulty perceiving and distinguishing objects or patterns with subtle differences in contrast. This can have several implications for their vision and daily life, since our world is not merely black and white.

2024年1月15日 · What is contrast sensitivity? Contrast sensitivity refers to the ability to distinguish an object from other objects and the background, even when it is not clearly outlined or prominent. It is one of the ways that visual function is measured.

2022年11月25日 · Contrast sensitivity testing measures how well the eyes can distinguish between finer and finer light increments compared to dark. This testing is not usually part of a routine eye exam. The doctor may recommend it if someone has a specific visual complaint that could affect their visual contrast.

2019年2月27日 · A contrast sensitivity test measures your ability to distinguish between finer and finer increments of light versus dark (contrast). This differs from common visual acuity testing in a routine eye exam, which measures your ability to recognize smaller and smaller letters on a standard eye chart.. Contrast sensitivity is a very important measure of visual function, …