Contrary to popular belief, it is quite possible and common to sleep with your eyes partially open, which can influence the quality of your rest.

noli's read

Sleeping with the eyes partially open is a well-documented reality that affects more people than one might think. According to data from the National Sleep Foundation (expert opinion) and an observational study conducted by Hwang et al., this phenomenon is estimated to affect between 5% and 20% of the population. Many people sleep this way without knowing it, as the opening is sometimes nearly invisible to the naked eye. Research confirms that this nocturnal exposure disrupts the eye's tear film, which can cause dryness or stinging upon waking. Looking into this subject is very useful for optimizing one's well-being, as a dark environment and well-protected eyes are essential for optimal rest. The creator's statement is therefore perfectly accurate and without any exaggeration.

the sources

No named source held this one up — that absence is part of the verdict.