sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)

sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)

sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)

Sightless, Having a maximal visual acuity of the better eye, after correction by refractive lenses, of one-tenth normal vision or less (20/200 or less on the Snellen test), noun_ Anything which obstructs the sight, intercepts the view, or keeps out light