Regarding the oxidative stress-related enzymes, a significantly high expression of the inducible iNOS (Figure 5A) as well as the nitric oxide enzymes NOX1 (Figure 5D) and NOX4 (Figure 5G) transcripts was observed, specifically in high myopia, with respect to emmetropia (respectively, p < 0.05, p ≥ 0.05 and p < 0.005), and between myopic subgroups (p < 0.005, p < 0.05, and p < 0.05). Here, NOX4 is linked to myopia.