Pinguecula and pterygium are both types of non-cancerous tissue overgrowth. If a pinguecula progresses and grows into the cornea, it becomes a pterygium. You can use over-the-counter lubrication ...
Preservatives in the glue can cause toxic conjunctivitis and conjunctival erosion—when the layer of cells on the surface of the cornea, called epithelium, loosens from the layer underneath.