Yes, it is common for people to see what are commonly referred to as "floaters" or "visual snow" when it is dark or in low-light conditions. These are tiny, transparent, and sometimes squiggly or star-like dots or threads that appear to float in the field of vision.
Floaters are small specks of debris in the vitreous humor, the gel-like substance that fills the inside of the eye. When light passes through the eye and strikes these tiny particles, they cast shadows on the retina, which leads to the perception of floaters.
Visual snow, on the other hand, is a condition where individuals see what looks like "static" or a continuous stream of tiny flickering dots across their entire field of vision, even in well-lit environments. This condition can be more noticeable in the dark.
Both floaters and visual snow are generally harmless and common, and many people experience them to varying degrees. They are usually not a cause for concern unless they suddenly increase in number or are accompanied by other vision changes or symptoms, in which case it is advisable to consult an eye care professional for a thorough examination.
It's worth noting that the perception of these visual phenomena can vary from person to person, and some people may see more or fewer of these dots or experience different visual effects in low-light conditions. If you have concerns about your vision or experience significant changes in your visual perception, it's always best to seek advice from an eye doctor for proper evaluation and guidance.