One of the components of photo pigments is derived from vitamin A. If a person doesn't get enough vitamin A and can't make enough photo pigment, will they have more difficulty seeing in bright light or dim light?
If a person does not get enough vitamin A and cannot make enough photo pigment, they will have more difficulty seeing in dim light. Photo pigments play a crucial role in low-light vision, as they help the eyes to capture and process light in darker conditions. Without enough photo pigment, the eyes will struggle to adapt to low-light environments, resulting in impaired vision in dim light. On the other hand, bright light vision is primarily controlled by the cones in the eyes, which are responsible for color vision and detail in well-lit conditions. Thus, the deficiency in vitamin A and photo pigment would have a more significant impact on vision in dim light.
