Purblindness and Sharp-sightedness

Sharp-sightedness and purblindness are semantically related. In some cases you can replace phrase "Sharp-sightedness" with "Purblindness", this terms are similar.

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

Purblindness and sharp-sightedness are semantically related. You can use "Purblindness" instead a noun phrase "Sharp-sightedness".