visual acuity
How sharply seen
Visual acuity is the sharpness or clarity of vision—the ability to discern fine detail.
Eye doctors measure it with letter charts, expressing results as ratios like 20/20 (normal) or 20/40 (needing to be at 20 feet to see what normal eyes see at 40).
Her visual acuity declined with age.
The term appears in medical contexts and vision research.
Acuity measurement display
- 20/20Normal visual sharpness
- diopterUnit of focal power
- refractionWave bending between media
- eye examAssessment of sight
Light-sensing tissue layer
- maculaRetinal region for acuity
- foveaRetinal depression for acuity
- photoreceptorsCells sensing light
- conesTapering geometric solids
rods · cornea · lens · pupil · iris · optic nerve · vitreous · choroid
Blurry distance vision
- hyperopiaDifficulty seeing nearby objects
- astigmatismIrregular corneal curvature disorder
- presbyopiaAge-related near vision loss
- amblyopiaReduced vision, one eye
glaucoma · cataract · macular degeneration · legal blindness · refractive error · nystagmus · strabismus · scotoma
State of being understandable
- sharpnessKeenness of edge, mind, or image
- keennessSharpness of perception
- eagle-eyedExceptionally sharp of vision
- hawk-eyedExtremely keen-sighted
clear-sighted · crisp · distinct · focused · precise · resolution · definition · discrimination
Eye disease physician
- optometristVision care professional
- ophthalmoscopeDevice for viewing retinas
- corrective lensesOptical devices fixing sight
- eyeglassesCorrective lenses worn
eye chart
Acuity measurement display
- 20/20Normal visual sharpness
- diopterUnit of focal power
- refractionWave bending between media
retina
Light-sensing tissue layer
- maculaRetinal region for acuity
- foveaRetinal depression for acuity
- photoreceptorsCells sensing light
cones · rods · cornea · lens · pupil · iris · optic nerve · vitreous · choroid · sclera
myopia
Blurry distance vision
- hyperopiaDifficulty seeing nearby objects
- astigmatismIrregular corneal curvature disorder
- presbyopiaAge-related near vision loss
amblyopia · glaucoma · cataract · macular degeneration · legal blindness · refractive error · nystagmus · strabismus · scotoma · night blindness
clarity
State of being understandable
- sharpnessKeenness of edge, mind, or image
- keennessSharpness of perception
- eagle-eyedExceptionally sharp of vision
hawk-eyed · clear-sighted · crisp · distinct · focused · precise · resolution · definition · discrimination · discernment
ophthalmologist
Eye disease physician
- optometristVision care professional
- ophthalmoscopeDevice for viewing retinas
- corrective lensesOptical devices fixing sight
eyeglasses · contact lenses · LASIK · magnifier · prescription
- visionsharp, eye, sight, eyes, blurry
- perceptionsee, seeing, senses, observing, watching
- eye careeye doctor, optometrist, ophthalmologist, eye exam, glasses
- eye healthglaucoma, cataracts, myopia, hyperopia, astigmatism
- observation skillsattention to detail, attention, detail, patterns, focus
- ophthalmologyeye diseases, eye surgery, cornea, retina, iris
visual acuityblurred vision
Unclear visual perception
blurriness · poor eyesight · hazy vision · clouded vision · visual distortion
visual acuityblindness
Absence of vision
visual impairment · legal blindness · blurred vision · poor eyesight · low vision
visual acuityperipheral vision
Sight at edges
peripheral awareness · visual field · motion detection · night vision
acute, vision, visual, revision, visionary, visualize, acuity, visibility, visions