Clinical / Healthcare implications: There are many benefits in using CCM in autoimmune disease. CCM allows rapid, non-invasive imaging of the corneal nerves and dendritic cells to determine the level of inflammation and its consequence in autoimmune diseases. This will allow earlier diagnosis, risk stratification and more timely intervention at the rheumatology clinics, enhancing multidisciplinary care of autoimmune patients. The investigator will build a normative database (either ethnic or local age specific data from a reading centre) by using this study as a platform to recruit more patients.