Meibomian gland dysfunction (MGD) arises when the meibomian glands in your eyelids become obstructed or function inadequately. Common signs and symptoms that could point to a blocked meibomian gland encompass persistent dryness, burning, itching, or a gritty sensation in the eyes, which are typical dry eye symptoms. Inflammation of the eyelids, also known as blepharitis, might be related to MGD and can result in red or swollen eyelids. Fluctuating or blurry vision, excessive tearing, or heightened sensitivity to light could be caused by an unstable tear film due to MGD, indicating an irregular tear film. Furthermore, blocked meibomian glands might be noticeable as tiny, hardened, or yellowish secretions at the base of the eyelashes, affecting the eyelid's appearance.