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It is mostly used (in English) in the military, where the coup d'œil refers to the ability to discern at one glance the tactical advantages and disadvantages of the terrain. For example, King Frederick the Great of Prussia in his "Military Instruction from the Late King of Prussia to His Generals" devotes special attention to the military coup ...
Normally, visual acuity refers to the ability to resolve two separated points or lines, but there are other measures of the ability of the visual system to discern spatial differences. Vernier acuity measures the ability to align two line segments. Humans can do this with remarkable accuracy. This success is regarded as hyperacuity.
Leonardo da Vinci: The eye has a central line and everything that reaches the eye through this central line can be seen distinctly. Alhazen (965 – c. 1040) carried out many investigations and experiments on visual perception, extended the work of Ptolemy on binocular vision, and commented on the anatomical works of Galen.
Bruce & Young Model of Face Recognition, 1986. One of the most widely accepted theories of face perception argues that understanding faces involves several stages: [7] from basic perceptual manipulations on the sensory information to derive details about the person (such as age, gender or attractiveness), to being able to recall meaningful details such as their name and any relevant past ...
Bain identifies the intellect's defining feature – the ability to retain and recall sensations and mental states (even without external stimuli), distinguishing it as a capacity to "live both in ideas and actualities". Furthermore, the intellect has the inherent ability to discern and compare conscious states, with an inherent understanding ...
"Professional Vision" (1994) This essay is Goodwin's most cited work. According to Goodwin, the ability to discern what is important in any profession is not a natural psychological ability, but one that emerges from the discursive practices of professionals demonstrating their expertise.
Pilots hit in eyes with lasers amid drone chaos The FBI's Newark office issued a warning about an increase in pilots hit in the eyes with lasers because people on the ground think they see a drone.
An eye examination, commonly known as an eye test, [1] is a series of tests performed to assess vision and ability to focus on and discern objects. [2] It also includes other tests and examinations of the eyes. [2] Eye examinations are primarily performed by an optometrist, ophthalmologist, or an orthoptist.