The provided information states that approximately 1 in 12 men are colorblind. Therefore, without knowing the total male population being referenced, we can only say that colorblindness affects roughly one in every twelve men.
The reference explicitly mentions that:
- Prevalence: Nearly 1 in 12 men experience color blindness.
The exact number of men who are colorblind globally or in a specific region would require population data. However, the proportion is clearly stated.