(1) Detection thresholds at 10 Hz and high grating contrasts were approximately 11-15 arcsec in the fovea and 37-47 arcsec at 30 degrees eccentricity.
(2) These results suggest that in the absence of other clinical findings to the contrary, the demonstration of gross stereopsis with either the Frisby (730 arcsec) or Lang (733 or 800 arcsec) test in the preschool child implies normal binocular function.
(3) The threshold luminance contrast difference required to produce a just detectable change in spatial position corresponds to a spatial shift of 5-20 arcsec in the centroid of the retinal light distribution, depending upon contrast relative to the background.
(4) Increasing the intensity of the perturbating line (to equal that of the outer lines) elevated thresholds for small separations (less than 4 arcmin) to approximately 6 arcsec but had no effect on the threshold for larger separations.
(5) In the second experiment, preschool children with abnormal binocular vision were tested with the Lang and Frisby stereotests to determine if large disparities (730 to 800 seconds of arc [arcsec]) could be passed without normal binocular vision.
(6) With a stationary stimulus, observers can detect a vernier cue of less than 10 arcsec and acuity is unaffected by retinal-image motion of up to 3 deg s-1 We confirm this finding, but provide evidence against any general deblurring mechanism by showing that another kind of hyperacuity, discrimination of the distance between two parallel lines (spatial interval acuity), is interfered with by motion.
As
Definition:
(adv. & conj.) Denoting equality or likeness in kind, degree, or manner; like; similar to; in the same manner with or in which; in accordance with; in proportion to; to the extent or degree in which or to which; equally; no less than; as, ye shall be as gods, knowing good and evil; you will reap as you sow; do as you are bidden.
(adv. & conj.) In the idea, character, or condition of, -- limiting the view to certain attributes or relations; as, virtue considered as virtue; this actor will appear as Hamlet.
(adv. & conj.) While; during or at the same time that; when; as, he trembled as he spoke.
(adv. & conj.) Because; since; it being the case that.
(adv. & conj.) Expressing concession. (Often approaching though in meaning).
(adv. & conj.) That, introducing or expressing a result or consequence, after the correlatives so and such.
(adv. & conj.) As if; as though.
(adv. & conj.) For instance; by way of example; thus; -- used to introduce illustrative phrases, sentences, or citations.
(adv. & conj.) Than.
(adv. & conj.) Expressing a wish.
(n.) An ace.
(n.) A Roman weight, answering to the libra or pound, equal to nearly eleven ounces Troy weight. It was divided into twelve ounces.
(n.) A Roman copper coin, originally of a pound weight (12 oz.); but reduced, after the first Punic war, to two ounces; in the second Punic war, to one ounce; and afterwards to half an ounce.