"vision" . "vision decline" . . . . "Detection Distance of Looming Motion" . "visual" . "discerned" . . . . "Visual acuity" . "visual acuity test" . "20/50" . "decrease in visual acuity" . . "20/20" . "\\\"Normal\\\" vision" . . . "visual acuity of lateral motion" . . "resolution" . "20/200" . "clearly" . . "Visual capacity" . . . . "\\\"normal\\\" vision" . "vision acuity" . . "optimal vision" . . "SAVT" . "Visual acuity" . "visions" . . "20/750" . "'s distant vision chart" . "binocular acuity" . "20/1000" . "Snellen acuity" . "visual acuity#Normal vision" . "sharpness" . "ability to see" . "Detection Distance of Lateral Motion" . . "20/400" . . "aptitude of the visual system" . "Visual Acuity" . . . . "20/20 vision" . . "20/20 eyesight" . . "Visual acuity#Expression" . "visually acute" . "visual acuity" . . "Sharpness" . "2000/20 vision" . "Low Vision" . "softer lenses" . . "visual performance" . "perfect vision" . "acuity" . "Visual acuity testing in children" . "0.80" . . "subtended angular velocity detection threshold (SAVT)" . "central acuity" . "20/600" . "detail" . . . . . "visual acuity tests" . "eyesight" . . "normal human vision" . "dynamic visual acuity" . . "20/40 correctable to 20/20" . . "20/15 vision" . "VA" .