GRIN2B mutations have been found in patients with autism (O’Roak et al., 2011; Tarabeux et al., 2011), cerebral visual impairment (Bosch et al., 2016), West syndrome (Lemke et al., 2014) and intellectual disability (Endele et al., 2010; Adams et al., 2014; Lemke et al., 2014; Hu et al., 2016; Swanger et al., 2016). Here, GRIN2B is linked to Cerebral visual impairment.