Retinitis Pigmentosa initially affects which aspect of vision?

Retinitis Pigmentosa primarily impacts peripheral vision in its early stages. This condition involves the degeneration of photoreceptor cells, specifically the rods, which are responsible for night vision and peripheral sight. As these cells deteriorate, individuals begin to lose their ability to see in the peripheral field before they experience any changes in central vision. This progressive loss of peripheral vision leads to tunnel vision as the disease advances, effectively demonstrating how the initial effects of Retinitis Pigmentosa are centered around the peripheral aspects rather than central vision or color perception.

Using this understanding, while the other options relate to potential effects of Retinitis Pigmentosa, they do not accurately reflect the initial changes in vision that most individuals experience with this condition. Central vision typically remains intact until later stages, and while color perception can also be affected as the disease progresses, it is not the first aspect impacted. Night vision may diminish due to the loss of rod function, but again, the initial loss relates more importantly to peripheral vision.