What term refers to the condition diagnosed when a student's vision is affected in dimly lit areas and night vision?

The condition referred to when a student's vision is affected in dimly lit areas and at night is known as Retinitis Pigmentosa. This genetic disorder leads to a gradual degeneration of the retina's photoreceptor cells, which are essential for vision in low-light conditions. As these cells deteriorate, individuals often experience difficulties with night vision, and over time, peripheral vision may also diminish, potentially leading to tunnel vision.

In contrast, myopia, astigmatism, and hyperopia are refractive errors that primarily affect vision clarity at various distances rather than specifically impacting night vision or dim light conditions. Myopia, commonly known as nearsightedness, makes it difficult to see distant objects clearly; astigmatism causes blurred or distorted vision due to an irregular curvature of the cornea; and hyperopia, or farsightedness, makes close objects appear blurry while distant objects may be seen more clearly. Thus, Retinitis Pigmentosa is distinctly characterized by its impact on low-light vision and represents a different category of visual impairment.