threshold of visual acuity
1acuity — 1. Sharpness, clearness, distinctness. 2. Severity. [thr. Fr., fr. L. acuo, pp. acutus, sharpen] absolute intensity threshold a. the minimal light that can be seen. resolution a. detection of a target having two or more parts, often measured by… …
2vernier acuity — ver·ni·er acuity vər nē ər n the aspect of visual acuity that involves the ability to detect the alignment or lack of alignment of the two parts of a broken line (as in reading a vernier scale) compare GRATING ACUITY, HYPERACUITY, STEREOACUITY *… …
3eye, human — ▪ anatomy Introduction specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit The eye is protected from mechanical injury… …
4Optimum HDTV viewing distance — is the distance that provides the viewer with the optimum immersive visual HDTV experience. Although opinions vary on the exact screen size to distance relationship, formal research and recommendations suggest closer is preferred to further[not… …
5W. H. R. Rivers — Photograph of Rivers taken by Henry Maull Born 12 March 1864(1864 03 12) …
6nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …
7PULHES Factor — The PULHES Factor is the United States military acronym for the Military Physical Profile Serial System. It is used to qualify an enlistee s physical profile for each military skill. For instance, the MOS 19D Cavalry Scout requires a physical… …
8Diabetic retinopathy — Classification and external resources ICD 10 H36 (E10.3 E11.3 E …
9Color blindness — Colorblind and Colourblind redirect here. For other uses, see Colorblind (disambiguation). Color blindness or color deficiency Classification and external resources An 1895 illustration of normal vision and various kinds of color blindness …
10test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …
