Sharp-sightedness and Visual modality

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

Visual modality and sharp-sightedness are semantically related. In some cases you can use "Visual modality" instead a noun phrase "Sharp-sightedness".

Visual modality noun - The ability to see; the visual faculty.

Sharp-sightedness and visual modality are semantically related. Sometimes you can replace phrase "Sharp-sightedness" with "Visual modality", this phrases are similar.