To see as well as a person of age 25, a person of age 55 would typically need?

The correct answer highlights the visual changes that occur with aging, particularly in terms of light sensitivity and the ability to adapt to varying lighting conditions. As individuals age, the physiological changes in the eye, such as the yellowing of the lens and reduced pupil size, lead to decreased sensitivity to light. This means that a person around the age of 55 typically requires significantly more illumination to perceive the same level of brightness as a younger individual, approximately 100% more light being a commonly referenced figure in studies of vision and aging.

This concept is critical for lighting design, particularly in environments where older adults spend a lot of time, such as residential areas and public spaces. Providing adequate lighting to accommodate these changes ensures that visual tasks are performed safely and comfortably. Thus, understanding these requirements can help professionals design better lighting solutions that enhance visibility and improve quality of life for the aging population.