Twenty-twenty vision and Visual acuity

Visual acuity and twenty-twenty vision are semantically related In some cases you can replace phrase "Visual acuity" with "Twenty-twenty vision", this phrases are similar.

Visual acuity noun - Sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart).

Twenty-twenty vision and visual acuity are semantically related in keen sight topic. You can use "Twenty-twenty vision" instead a noun phrase "Visual acuity".