OPN5 and myopia: Certainly, a role for short wavelength light in preventing myopia has been identified in many animals including mammals (Long et al., 2009; Foulds et al., 2013; Qian et al., 2013; Jiang et al., 2014), however, other novel photopigments such as Opn3 and Opn5 are also blue/UV sensitive, and Opn5 has recently been shown to play a significant role in refractive development (Jiang et al., 2021), making interpretation of this result more complex.