👉 Lightlessness is a state of complete darkness or lack of sight, typically experienced by people in the absence of artificial lighting. It can be caused by several factors such as exposure to extreme temperatures, prolonged periods without sunlight, or even medical conditions like retinopathy or glaucoma. Lightlessness can affect various areas of the body, including the eyes and brain, and it is often accompanied by other symptoms like headache, nausea, and fatigue.