Which of the following statements about visual fatigue indicators is true?

• A. The stability of clear vision is an indicator of visual fatigue
• B. Visual fatigue does not affect vision
• C. Visual fatigue can improve color discrimination
• D. Visual fatigue indicators include pupil dilation

Answer: (A)

Visual fatigue shows up in how the eyes handle focus and keep images clear during extended near work. If someone’s vision remains surprisingly steady and clear even as tasks demand more focusing and effort, that steadiness can signal the eyes are under strain and fatigued. In this view, a stable, unchanging level of clear vision isn’t just a sign of sharp sight—it reflects the visual system’s effort to maintain clarity under fatigue, which is a detectable indicator.

By comparison, fatigue almost always affects vision in some way, so saying vision isn’t affected is inconsistent. Fatigue also doesn’t typically improve color discrimination; if anything, color perception can degrade with tired eyes. Pupil dilation can occur with fatigue, but it’s a less direct or reliable sole indicator than noticing how vision stability behaves under sustained load.