APOE and Schnyder corneal dystrophy: Those who converted were significantly older (72.73 ± 8.12 vs 65.76 ± 6.77, p < 0.001), had less years of education (10.07 ± 3.83 vs 12.80 ± 3.86, p = 0.01) and were more frequently APOE ε4 carriers (53.5% vs 21.05%, p = 0.007) than those who remained as SCD (Table 1).