Final answer:
The limit to the eye's acuity is actually related to diffraction by the pupil. When light passes through the pupil, it undergoes diffraction, causing the image to spread and blur.
Step-by-step explanation:
The statement that the limit to the eye's acuity is related to diffraction by the pupil is true. When light passes through the pupil, the circular aperture of the eye, it undergoes diffraction, which leads to the spreading and blurring of the image. This diffraction phenomenon sets the practical limit for the eye's ability to resolve details.