Dark adaptation is the process by which our eyes adjust to low light conditions. When we move from a bright environment to a dark one, our pupils dilate to allow more light in. This adjustment helps us see better in dim lighting. During dark adaptation, the photoreceptors in our eyes, specifically rods, become more sensitive to light. This process can take about 20 to 30 minutes to fully occur, allowing us to perceive details and shapes in the dark. The ability to adapt is crucial for activities like night driving or navigating in low-light situations.