And, especially in the sickest patients, doctors can see inflammation in the conjunctiva— the membrane that lines the front of the eye and inner eyelid.
The limbus acts as a barrier between the cornea and the conjunctiva but if it gets damaged, the conjunctiva can start to grow across the cornea, clouding the window and cutting out the light.
ANATOMY The eyelids are two fibromuscular structures: outer layer containing skin, muscle as well as dense fibrous tissue and an inner transparent layer called conjunctiva that close in front of the eyeball, hence protecting it.