People with certain eye disorder unable to see moderate bright light other than red, but they can see most components of dim light and red components of bright light. “Eyeglasses that are transparent to red components of light but filter out other components of light help these people see in moderately bright light.” If other components of bright light other than red are filter out, their eye would react normally to the bright light, or their retinas will be overwhelmed. B: “In an otherwise darkened concert hall, these people will see a dimly illuminated red exit sign more clearly than small dim white lights that mark the aisles.” The passage make no comparison between red components of dim light and its whote components. It simply say that “these people do, however, show normal sensitivity to most components of dim light.” |