This is a longitudinal natural history study to evaluate and study the immunologic changes to the ocular surface in cancer patients.
Two groups of subjects will be recruited for the study: 1) Pre-bone marrow transplant cancer patients. They will be evaluated every 3 months for 2 years.2) Normal control patients. They will be evaluated every 6 months for the duration of the study.
During each study visit, in addition to standard of care exams, certain biological specimens ( ocular surface wash, mucocellular material, corneal filaments, or impression cytology of conjunctiva, blood, or serum) will be collected.
