Common vision issue could lead to missed cancer warning, study finds

Colorblindness, a condition that mostly affects men, could be linked to a higher mortality risk in bladder cancer cases, a new study suggests.

About 8% of men are estimated to have a form of color vision deficiency (CVD), compared to 0.5% of women, according to global statistics.

The condition, in which patients see and identify color differently, could cause people to miss blood in their urine, which is a vital sign of bladder cancer.

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