What is a typical characteristic of a Meibomian cyst?

A Meibomian cyst, also known as a chalazion, typically presents as a non-erythematous and non-fluctuant lump on the eyelid. This is due to the blockage of the Meibomian glands, which are responsible for providing lubrication to the eye. The cyst can become prominent, but it generally does not exhibit redness or tenderness unless it becomes secondarily infected. It is important to note that while the cyst can occur in any eyelid, it is not restricted to just the lower eyelid; it can affect both the upper and lower eyelids. Furthermore, these cysts may persist for a long period of time and do not resolve usually within a week without treatment, which distinguishes them from other acute inflammatory processes that might be more transient.