The Shumiya cataract rat (SCR) is a hereditary cataractous rat strain in which the appearance of cataracts showing excessive collapse of the lens structure occurs in 66.7% of adults (cataractous SCR, SCR-C, ctr1 × ctr1, Ctr2 × Ctr2l) [17]. Here, SLC31A2 is linked to cataract.