After completion of the behavioral tests, when the mice were 16 weeks old we performed histological analyses of the retina and cornea, because patients with the ELOVL1 mutation exhibit retinal pathology such as thinning of the nerve fiber layer in the retina,17, 18 and aged Elovl1−/−Tg(IVL‐Elovl1) mice exhibit corneal opacity.13 The histological architecture of the retina, including the nerve fiber layer, did not differ detectably between control and Elovl1−/−Tg(IVL‐Elovl1) mice (Figure 6A). Here, ELOVL1 is linked to Corneal opacity.