Although TRPM1 encodes a calcium-permeable cation channel, which has been associated with autosomal recessive congenital stationary night blindness (CSNB), a case has recently been described in a 4-week-old boy of non-consanguineous parents affected by unilateral nuclear cataracts [76]. The gene discussed is TRPM1; the disease is autosomal recessive congenital stationary night blindness.