BDNF and myopia: As shown in Figure 1, NGF (Figure 1A) and BDNF (Figure 1C) protein levels were significantly decreased in humor aqueous collected from patients with myopia (respectively, p < 0.005 and p < 0.005) and high myopia (respectively, p < 0.0005 and p < 0.005) with respect to emmetrope, while no difference was detected between myopia and emmetrope (p > 0.05).