A concretion is a small, hard, yellow or white deposit which can form in the conjunctiva that lines the inside of your eyelids. They can occur as a result of long-term inflammation, chronic irritation/allergies, and the normal aging process. The cells in your conjunctiva begin to degenerate. As this happens, other materials fill the space in what is known as a cyst. As the cyst hardens, it forms a small piece of calcium. They can also be associated with giant papillary conjunctivitis.
Treatment involves a topical anesthetic and using a needle to remove them.
Los Alamos Family Eyecare, P.C. 