5 Key Takeaways

• 1

  Color vision deficiency (CVD) affects approximately one in 12 males and one in 200 females, impacting their ability to detect visible blood.

• 2

  Patients with bladder cancer and CVD showed lower overall survival rates compared to those without CVD, indicating a potential diagnostic gap.

• 3

  In contrast, no significant survival difference was observed in colorectal cancer patients with CVD, suggesting varying impacts by cancer type.

• 4

  CVD may lead to delayed care-seeking due to misinterpretation of blood in urine or stool, particularly in bladder cancer.

• 5

  The study highlights the need for routine assessment of CVD in clinical practice to improve cancer detection and patient outcomes.