The behavioral tests were conducted on male control [Elovl1+/+Tg(IVL‐Elovl1)] and Elovl1−/−Tg(IVL‐Elovl1) mice from when they were eight weeks old until they were 16 weeks old, well before the development of corneal opacity, as observed previously.13 The body weight of Elovl1−/−Tg(IVL‐Elovl1) mice was about 15% smaller than that of control mice (Figure 4A). The gene discussed is ELOVL1; the disease is Corneal opacity.