Blepharitis is a chronic inflammation of the eyelids which usually affects both eyes. It is a very common condition which can affect people of all ages. The condition is not usually contagious, and generally does not cause any permanent damage to vision. For further information view the information sheet below.
A chalazion is an inflammatory lump or cyst in the eyelid caused by a blockage located at one of the tiny meibomian gland openings along the upper and lower eyelid margin.