eyesight, binocular vision, optic nerve, retina, nystagmus, hemianopia, fovea, headlights, nearsightedness, eyepiece, proprioception, blurriness, visual acuity, retinal detachment, crystalline lens, astigmatic, achromatopsia, monocular vision, astigmatism, cataracts, facial expression, reflexes, occipital lobe, viewfinder, visual impairment, retinitis pigmentosa, macula, parallax, retinal, cornea, magnification, sharpness, macular degeneration, squint, stereopsis, curvature, photosensitivity, aperture, diopter, monocular, intraocular pressure, spherical aberration, saccade, visual, headlamp, prosopagnosia, camera lens, presbyopia, eyes, vignetting, haloing, papilledema, tactile sensation, sight, puffiness, proprioceptive, chromatic aberration, diplopia, photoreceptors, penlight, sightless, scotoma, underexpose, glaucoma, quickness, goggles, cavefish, magnifier, reticule, frontal lobe, vestibular, ophthalmoscope, eyelids, amblyopia, visual cortex, stereovision, ambulate, brightness, visor, afterimage, extremities, cerebellum, pupillary, translucency, squinched, gait, eyestrain, brain, anisometropia, photophobia, binocular, collimation, phantom limb, bifocals, retinopathy, nonreflective, glasses, strobe, lenses, legibility, drowsiness, blindspot