As reported in Figure 1a,c, the only statistically significant differences regarding the two groups appeared for the absolute leukocytes (p = 0.029) and CD4+ effector memory T-cell% (p = 0.048), on average more represented in the SCD HU− subgroup, along with mean CD3+ (PAN-T) cell% (p = 0.012), less represented in the SCD HU− subgroup. This evidence concerns the gene CD4 and Schnyder corneal dystrophy.