Source: https://timesofindia.indiatimes.com/science/why-we-see-things-in-the-dark-how-our-brains-work-in-absence-of-light/articleshow/125050164.cms

Our brains actively construct vision in near-darkness, blending residual light with memory and prediction. Even with minimal visual input, the brain maintains coherence, relying on internal models and neural networks for spatial awareness. Optimal light levels boost cognitive function, while dim or bright conditions cause fatigue, highlighting the brain's intricate relationship with illumination.