AP Psychology Practice Test 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 530

What does acuity refer to?

The adjustment of lens thickness

The sensitivity to light

The sharpness of vision

Acuity refers to the sharpness or clarity of vision. It indicates how well the eye can distinguish between details and is typically measured using a visual acuity test, often represented in terms of distance, such as 20/20 vision. High acuity means that one can see fine details clearly, while low acuity suggests that vision may be blurred or unclear.

The other concepts in the options relate to different aspects of vision, such as how the eye adjusts to light levels or the physical adjustments made by the lens, but these do not define acuity itself. Thus, understanding acuity as sharpness of vision accurately captures its meaning in the context of visual perception.

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The angle of vision

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