Final answer:
It is true that contact lenses can be worn during visual acuity testing as they provide a consistent correction for the person's vision, which the test aims to measure.
Step-by-step explanation:
The statement that contact lenses can be worn while testing visual acuity is true. Contact lenses correct vision by adjusting the refraction of light as it enters the eye, providing a clear image on the retina. They are designed to sit directly on the eye, moving with it, and thus maintain a constant corrective effect. When conducting a visual acuity test, like reading from a Snellen chart, the objective is to determine the sharpness of the patient's vision with their current vision correction, which includes contact lenses or eyeglasses. Therefore, if the individual typically wears contact lenses to correct their vision, they should also wear them during the test to accurately assess their visual acuity.