question: When you look to a spinning car wheel, everything gets blurred. But when you blink, all details are visible for a millisecond. Why is that?
comment: Persistence of vision. We dont see frames, we see continuous movement, and not only that out eyes/brain see several milliseconds at once. When you blink you reduce the amount of time your eyes can see so etching moving. Less movement means your eyes/brain have less time to see that movement, but your brain is smart and will actually catch what you saw and remember for a small amount of time allowing you to remember some details.
passages: The blinking technique is less used today because image differencing algorithms detect moving objects more effectively than human eyes can. To measure the precise position of a known object whose direction and rate of motion are known, a "track and stack" software technique is used. Multiple images are superimposed such that the moving object is fixed in place; the moving object then stands out as a dot among the star trails. This is particularly effective in cases where the moving object is very faint and superimposing multiple images of it permits it to be seen better.
  
  Section::::See also.
   A reflex blink occurs in response to an external stimulus, such as contact with the cornea or objects that appear rapidly in front of the eye. A reflex blink is not necessarily a conscious blink either; however it does happen faster than a spontaneous blink. Reflex blink may occur in response to tactile stimuli (e.g. corneal, eyelash, skin of eyelid, contact with eyebrow), optical stimuli (e.g. dazzle reflex, or menace reflex) or auditory stimuli (e.g., menace reflex)
  
  Section::::Types of blink.:Voluntary blink.
   Section::::Function and anatomy.:Central nervous system's control.
  
  Though one may think that the stimulus triggering blinking is dry or irritated eyes, it is most likely that it is controlled by a "blinking center" of the globus pallidus of the lenticular nucleus—a body of nerve cells between the base and outer surface of the brain. Nevertheless, external stimuli can contribute. The orbicularis oculi is a facial muscle; therefore its actions are translated by the facial nerve root. The levator palpebrae superioris’ action is sent through the oculomotor nerve. The duration of a blink is
   Section::::Fictional character biography.:New Mutants.
   on average 100–150 milliseconds according to UCL researcher and between 100–400 ms according to the Harvard Database of Useful Biological Numbers. Closures in excess of 1000 ms were defined as microsleeps.
  
  Greater activation of dopaminergic pathways dopamine production in the striatum is associated with a higher rate of spontaneous eye blinking. Conditions in which there is reduced dopamine availability such as Parkinson's disease have reduced eye blink rate, while conditions in which it is raised such as schizophrenia have an increased rate.
  
  Section::::Types of blink.
  
  There are three types of blink.
  
  Section::::Types of blink.:Spontaneous blink.
   A person's eyes reveal much about how they are feeling, or what they are thinking. Blink rate can reveal how nervous or at ease a person may be. Research by Boston College professor Joe Tecce suggests that stress levels are revealed by blink rates. He supports his data with statistics on the relation between the blink rates of presidential candidates and their success in their races. Tecce claims that the faster blinker in the presidential debates has lost every election since 1980. Though Tecce's data is interesting, it is important to recognize that non-verbal communication is multi-channeled, and focusing on only one aspect is reckless. Nervousness can also be measured by examining each candidates' perspiration, eye contact and stiffness.
   This hypothesis is consistent with the results of their study in which participants were instructed to detect animal targets in RSVP sequences, and then report their identities and locations. While participants were able to detect the targets in most trials, they were often subsequently unable to identify or localize them. Furthermore, when two targets were presented in quick succession, participants displayed a significant attentional blink when required to identify the targets, but the attentional blink was mostly eliminated among participants only required to only detect them. Evans & Treisman explain these results by with the hypothesis that the attentional blink occurs because the identification stage requires attentional resources, while the detection stage does not.
   There is as yet no conclusive explanation for the phenomenon of lag 1 sparing, although it is thought to be related to the first parallel stage of the two-stage system of stimulus selection and processing.
   Blink (comics)
  
  Blink (Clarice Fong Ferguson) is a fictional character, a superheroine appearing in American comic books published by Marvel Comics, usually those featuring the X-Men. She was a member of Generation X.
  
  Fan Bingbing portrays Blink in the film "" while Jamie Chung plays a younger Blink in the TV series "The Gifted".
  
  Section::::Publication history.
  
  Created by writer Scott Lobdell and artist Joe Madureira, Blink first appeared in "Uncanny X-Men #317" (October 1994).
   BULLET::::- Jamie Chung portrays Blink, renamed Clarice Fong following the 2014 film, in the 2017 Fox television series "The Gifted".
  
  Section::::In other media.:Film.
   The film received mixed to positive reviews. It holds a 65% rating on Rotten Tomatoes from 23 critics.
   When working on computer screens people tend to blink less which leads to the eyes drying out faster. Reminding people to blink or do blinking exercises is achieved via static reminders (such as eyeleo).
  
  Real-time feedback based blink reminders (such as VisionProtect) actively measure the blinking rate of the user and notify the user via visual/audial alert. The effectiveness of real-time feedback based blink reminder systems is proven in a study by Osamu Fukushima and Masao Saito.
   Blinking may have other functions since it occurs more often than necessary just to keep the eye lubricated. Researchers think blinking may help us disengage our attention; following blink onset, cortical activity decreases in the dorsal network and increases in the default-mode network, associated with internal processing. Blink speed can be affected by elements such as fatigue, eye injury, medication, and disease. The blinking rate is determined by the "blinking center", but it can also be affected by external stimulus.
   Section::::Fictional character biography.:Dark Reign.
  
  When Hercules travels to the Underworld, Blink is among the dead characters seen in Erebus gambling for their resurrection. Unlike the others, Blink just stands there watching them gamble.
  
  Section::::Fictional character biography.:Necrosha.
   Eye-trackers necessarily measure the rotation of the eye with respect to some frame of reference. This is usually tied to the measuring system. Thus, if the measuring system is head-mounted, as with EOG or a video-based system mounted to a helmet, then eye-in-head angles are measured. To deduce the line of sight in world coordinates, the head must be kept in a constant position or its movements must be tracked as well. In these cases, head direction is added to eye-in-head direction to determine gaze direction.
   Section::::Cast.
  
  BULLET::::- Mena Suvari as Tracy
  
  BULLET::::- Brian Austin Green as Jack
  
  BULLET::::- Joanne Kelly as Claire
  
  BULLET::::- Zack Ward as Alex
  
  BULLET::::- Brian Austin Green as Jack
  
  BULLET::::- Fiona Gubelmann as Ella
  
  BULLET::::- David de Lautour as Noah
  
  BULLET::::- Leif Gantvoort as Sam
  
  BULLET::::- Emelie O'Hara as Amelia
  
  BULLET::::- Curtiss Frisle as Lucas
  
  BULLET::::- Samantha Jacober as Charlotte
  
  BULLET::::- Robert Picardo as Man in Black
  
  Section::::Production.
   In photographs taken a few days apart, rapidly moving objects such as asteroids and comets would stand out, because they would appear to be jumping back and forth between two positions, while all the other fixed stars remained stationary. Photographs taken at longer intervals could be used to detect stars with large proper motion, or variable stars, or to distinguish binary stars from optical doubles.
  
  The most notable body to be found using this technique was Pluto, discovered by Clyde Tombaugh in 1930.
   BULLET::::1. The lattice arrangements of the collagen fibrils in the stroma. The light scatter by individual fibrils is cancelled by destructive interference from the scattered light from other individual fibrils.
  
  BULLET::::2. The spacing of the neighboring collagen fibrils in the stroma must be  200 nm for there to be transparency. (Goldman and Benedek)
   Section::::Production.:Filming.
   The Moon-Blink detector has been designed based on the principle that the observer will be immediately drawn to any movement taking place on parts of a large static images. The principle of operation of the detector is described next:
   Section::::Vision.:Smooth pursuit movement.
  
  Eyes can also follow a moving object around. This tracking is less accurate than the vestibulo-ocular reflex, as it requires the brain to process incoming visual information and supply feedback. Following an object moving at constant speed is relatively easy, though the eyes will often make saccadic jerks to keep up. The smooth pursuit movement can move the eye at up to 100°/s in adult humans.
  
  It is more difficult to visually estimate speed in low light conditions or while moving, unless there is another point of reference for determining speed.
  
  Section::::Vision.:Optokinetic reflex.
   Menace reflex
  
  The menace response is one of three forms of blink reflex. It is the reflex blinking that occurs in response to the rapid approach of an object. The reflex comprises blinking of the eyelids, in order to protect the eyes from potential damage, but may also include turning of the head, neck, or even the trunk away from the optical stimulus that triggers the reflex.
   Section::::Production.:Effects.
   When AB is tested, most often the stimuli presented are inanimate objects. But research shows that not only do inanimate stimuli effect AB but human faces do as well. Despite the hypothesis that configural and featural information are processed by separate channels, thus avoiding AB, human faces in all different configurations, are still processed and affected by AB.
   Suchow and Alvarez explain the role that velocity has on motion silencing in that local retinotopic (of the retina) detectors fixate on specific points in the visual field, and when they are only permitted a short amount of time to process the changes occurring they do not have enough time to detect changes. The effect of velocity explains why silencing is more potent with fast motion on the retina as opposed to slow motion.
  