**2. Characteristics of rheumatic diseases, in which the most frequent changes in the organ of sight occur**

The rheumatoid arthritis (RA) and spondyloarthropathies (SpA) are the most common in‐ flammatory rheumatic diseases. Significantly less frequently uvenile idiopathic arthritis (JIA), Sjögren's syndrome (SS), systemic lupus erythematosus (SLE) and other less frequent connective tissue diseases as scleroderma, dermato-and polymiositis, recurrent inflamma‐ tion of the cartilage and systemic vasculitis are observed.
