Which of the following is the most common swelling of eyelids?
These are the most common lid swellings. A meibomian cyst is a chronic granulomatous inﬂammation  of a meibomian gland. It may occur on either upper or lower lids and presents as a smooth, painless  swelling. It can be felt by rolling the cyst on the tarsal plate.
Key Concept:
Meibomian cyst: They are epidermal cysts found on the free  edge  of  eyelid.  
Chronic Meibomian cyst is called chalazion.
Chalazion
Neurofibromatosis
Rodent ulcer
Dermoid cyst