RASGRF1 and myopia: In that study, the T allele was associated with myopia, and Hysi and colleagues related their results to animal research showing that RASGRF1-deficient mice displayed retinal vision impairments such as photoreception deficits (Fernandez-Medarde et al., 2009) as well as larger crystalline lenses and, as a result, larger refractive power, when compared to wild-type mice (Hysi et al., 2010).