HMGCR and blue cone monochromacy: In the exploratory analyses stratified for HMGCR expression, statin use was not associated with BCM in patients with negative/weak HMGCR expression (HRage-adj. 0.37, 95% CI 0.11–1.24, P = 0.11, Table 3) nor in patients with moderate/strong HMGCR expression (HRage-adj. 0.77, 95% CI 0.19–3.10, P = 0.71, Table 3).