ENTPD1 and Schnyder corneal dystrophy: Our data showed an increase in CD39+ T cells in SCD population in percentage (40.8% vs. 25.3%, p-value ≤.01) and in absolute number (21.4/mm3 vs. 11.7/mm3, p-value ≤.001) with a percentage decrease in CD39-T cells (50.7% vs. 65.8%, p-value ≤.001).