The writer describes a house in which various activities stop. This appears to be a metaphor for the human body as it becomes old. (See: [[rc://en/ta/man/jit/figs-metaphor]])
Possible meanings of this metaphor, where "windows" represents the old person's eyes, are 1) the old person himself can no longer see clearly. Alternate translation: "those who try to see can only see dimly." Or 2) what the old person sees is no longer clear. Alternate translation: "the people whom they see looking at them are dim"