As the population ages, understanding how vision changes over time is becoming increasingly important for lighting design. This paper explores the impact of age-related changes in eyesight, including reduced sensitivity, slower adaptation to light levels, increased glare sensitivity and diminished contrast perception. Drawing on recent research, it examines how these changes affect mobility, safety and confidence after dark, and considers practical lighting solutions that balance the needs of older people with environmental, dark-sky and energy-efficiency objectives.
