1. Introduction Bloodshot eyes after a short nap are frequently the result of nocturnal lagophthalmos, a condition where the eyelids fail to close completely during sleep. This partial opening exposes the cornea to ambient air, leading to rapid tear film evaporation and subsequent tissue desiccation. The ocular immune system responds to this dry irritation by … Read more
1. Introduction Eyes feeling gritty and dry upon waking are primarily caused by nocturnal lagophthalmos, meibomian gland dysfunction, or a natural physiological decrease in basal tear production during sleep. When the delicate ocular surface is exposed to air overnight or lacks the necessary lipid layer to prevent evaporation, the tear film degrades. This degradation creates … Read more
1. Introduction Extremely dry and scratchy eyes at night are most commonly caused by a natural reduction in basal tear production during sleep, combined with nocturnal lagophthalmos, a widespread condition where the eyelids fail to form a complete seal. This incomplete closure exposes the delicate ocular surface to the ambient air for hours, leading to … Read more