Low-light vision refers to the ability of the human eye to see in dim lighting conditions. This capability is primarily due to the presence of rods, a type of photoreceptor cell in the retina that is sensitive to low levels of light. While cones are responsible for color vision and function best in bright light, rods allow us to perceive shapes and movement in darker environments. Several factors can influence low-light vision, including age and overall eye health. As people age, the number of functional rods may decrease, leading to difficulties in seeing at night. Additionally, certain conditions, such as cataracts or retinitis pigmentosa, can further impair low-light vision, making it challenging to navigate in poorly lit areas.