What is contrast sensitivity and why is it important?

Contrast sensitivity refers to the ability of the visual system to distinguish between objects and their background, particularly when those objects are of similar colors and brightness levels. This skill is crucial for various daily activities, especially driving, where recognizing shapes and delineations in low-light conditions or unfavorable weather is vital for safety. The ability to perceive contrast allows individuals to identify pedestrians, road signs, and other vehicles effectively, even when visibility is compromised. Night vision relies heavily on this ability, making contrast sensitivity an essential aspect of visual performance in everyday life.

The importance of contrast sensitivity extends beyond driving; it plays a role in activities like reading, recognizing faces, and performing tasks in varying lighting conditions. Without sufficient contrast sensitivity, individuals may struggle to navigate the world around them, impacting both safety and quality of life.