Wow , had this exact same thing happen to me outside of a grocery store near me on two separate occasions . Only difference is the guys who approached me had flyers , not business cards . You got some fancy scammers where you ' re at lol . <| sep |> in reality it ' s more color deficiency than blindness . As blindness is that you can ' t see anything , so you wouldn ' t be able to see any color . There is an island in the south pacific where no outsider has been accepted into producing offspring , so the island has a trait that doesn ' t allow them to see any color . So during the day they have to wear shades to protect their eyes , but they can see clear at night in pitch blackness that we would not be able to see in .