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Monday, August 3, 2020 | History

2 edition of effects of monocular vision on measures of reading efficiency and perceptual span found in the catalog.

effects of monocular vision on measures of reading efficiency and perceptual span

Charles Anthony Knehr

effects of monocular vision on measures of reading efficiency and perceptual span

by Charles Anthony Knehr

  • 146 Want to read
  • 20 Currently reading

Published by Lancaster press in [Lancaster, Pa .
Written in English

    Subjects:
  • Eye -- Movements.,
  • Perception.,
  • Reading, Psychology of.

  • Edition Notes

    Other titlesMonocular vision.
    Statementby Charles Anthony Knehr.
    Classifications
    LC ClassificationsBF456.R2 K55
    The Physical Object
    Pagination133-154 p.
    Number of Pages154
    ID Numbers
    Open LibraryOL183163M
    LC Control Numbera 42000926
    OCLC/WorldCa35602086

    • Test: measures distance from eyes where both eyes can focus without double vision or eyes drifting 1. Move pen towards nose 2. Have person maintain focus on pen 3. Should be able to maintain focus then “break” 3” from nose 4. Refer if “break” more than 4” and/or reports double vision before 3”.   Monovision can be used as a method to correct presbyopia with contact lenses (CL) but its effect on reading behavior is still poorly understood. In this study eye movements (EM) were recorded in.

    Painless vision loss rarely involves these elements. Next, is the vision loss partial, full, blurry, monocular, or binocular. Binocular vision loss is usually cerebral, thus a neurologic, rather than an ophthalmic pathology. Was it sudden, or gradual, constant . Binocular reading also comes with an advantage: reading speed is high and word frequency effects (i.e., faster lexical processing of words that are more often encountered in a language) emerge during fixations, which is not the case for monocular reading (Jainta, Blythe, & Liversedge, ).

      Recognizing, remembering, and applying information quickly and easily is critical for performance in reading comprehension, and student must have a healthy vision system to do so. The following are specific ways visual perceptual processing may interfere with reading comprehension. monocular vision is not a major disability and that rehabilitation is unnecessary (Schiff, ). In contrast, the limited research in this area has found that people with monocular vision experience a range of perceptual problems that create difficulties in managing daily activities in such areas as mobility.


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Effects of monocular vision on measures of reading efficiency and perceptual span by Charles Anthony Knehr Download PDF EPUB FB2

Monocular reading showed significantly increased ( per cent) fixation duration (p character spaces (p. The perceptual span or region of effective vision during eye fixations in reading was examined as a function of reading speed (fast readers were compared with slow readers), font characteristics (fixed width vs.

proportional width), and intraword spacing (normal or reduced). The main findings were that fast readers (reading at about wpm) had a larger perceptual span than did Cited by: The size of the perceptual span (or the span of effective vision) in older readers was examined with the moving window paradigm (G.

McConkie & K. Rayner, ). Two experiments demonstrated that older readers have a smaller and more symmetric span than that of younger readers. These 2 characteristics (smaller and more symmetric span) of older readers may be a consequence of their. Monocular Vision: a condition in which one eye is blind, seeing with only one eye.

Binocular Vision: seeing with two eyes simultaneously. Depth Perception: ability to detect how far away an object is from other objects. When looking at depth perception, there are two sets of cues that contribute to what we perceive.

Binocular cues and monocular. The article makes interesting reading for people who are adjusting to monocular vision. It also helps to educate others about the challenges for people with monocular vision.

The article includes literature, occupational concerns, safety and eye protection, driving, activities of daily living, future risk, hobbies, loss and impairment, cosmetic. Acquired Monocular Vision Rehabilitation program Carolyn Ihrig, OD;1–2* Daniel P.

Schaefer, 19 percent of patients reported difficulty reading after los-ing vision in one eye [1]. Fatigue while reading and losing they connect to the object, such as a doorknob, a book on the shelf, a cup on the counter, or a friendly handshake [16].

Monocular vision is when there is vision in one eye only, meaning you will lose part of your field of view and may have difficulty with depth perception. This may lead to problems when judging your distance from objects and the width of objects such as door frames, people moving towards you but outside your field of vision, or pouring liquid.

Monocular Vision is defined as vision wherein both eyes see different images. For instance, there are many birds that have monocular vision where each eye's vision is independent of the other. Although this type of vision can provide a larger field of vision, it.

Monocular vision is a condition in which one eye is blind, or one eye is unable to register images in coordination with the other eye.

There are a number of common obstacles that are associated with this type of impaired vision. The most common is the inability to determine the depth of objects that are close to a person, typically within three.

Monocular vision affects how the brain perceives its surroundings by decreasing the available visual field, impairing peripheral vision on one side of the body, and compromising depth perception, all three of which are major contributors to the role of vision in balance.

Reading is an important vision dependent ability in everyday private and business life. For adults and children, reading impairments may reduce the individual’s quality of life by negative effects on work and school education. 1, 2 With an overall prevalence of 2% to 4%, amblyopia is the most frequent cause of visual impairment in children and young adults in our population.

3– 5 The. The study is conducted to determine the effect of acquired monocular vision (enucleation, phthisis) on the daily activities of patients. Methods Sixty-five patients in a case series completed a question survey evaluating the functional consequences of monocular vision.

() Effects of foveal processing difficulty on the perceptual span in reading: Implications for attention and eye movement control. Journal of Experimental Psychology: Learning, Memory, and Cognition, 16(3),   Monocular Vision Adjustment Takes Time It takes more work than most might think to adjust to this type of sudden loss.

“Some people assume that if you have one eye with good vision, you will function the same way you would if you have two eyes. Visual-span profiles are plots of letter-recognition accuracy as a function of letter position left or right of the midline.

Previously, we have shown that contraction of these profiles in peripheral vision can account for slow reading speed in peripheral vision. Turning next to the target word analyses (see Figure 1), we examined the standard reading time measures of first fixation duration (the duration of the first fixation on the target word) and gaze duration (the sum of all fixations on the target word until a fixation on a different word).We obtained a three-way interaction between parafoveal text (binocular versus monocular), foveal text.

For this reason, Jainta et al. used the word frequency effect as a diagnostic of the efficiency of processing word identity during reading. The logic of their approach was that if a monocular cost disrupts normal processes of word identification, a diminution in the word frequency effect will be observed for monocular relative to binocular.

Questions regarding near vision address (1) fatigue while reading, (2) losing one's place while reading, and (3) spilling liquids when pouring. In addition, current employment and hobbies are addressed as to each specific task and noted if difficulty is mild, moderate, or severe.

Typically identified due to a decrease in reading efficiency, comfort and comprehension. (they tire, complain, rub their eyes, and lose their place) Problems most typically worsen as school demands increase: Smaller print, No pictures, More words per page 1.

Binocular Vision Disorders • Convergence Insufficiency • Convergence Excess. Alan Kennedy, in Reading as a Perceptual Process, Parafoveal-on-foveal effects. As noted, modulation of the preview effect by foveal load is compatible with a degree of parallel processing. It could, for example, be interpreted in terms of the expansion or contraction of the perceptual span (Henderson and Ferreira, ).

No significant differences between the two groups were found in respect of the binocular logMAR visual acuity and reading acuity (p>). For the monocular reading performance, significant.The Effects of Monocular Vision on Measures of Reading Efficiency and Perceptual Span.

C. A. Knehr - - Journal of Experimental Psychology 29 (2) Binocular Rivalry in Philosophy of Cognitive Science.Reading is recognised as an important vision‐dependent ability that contributes to an individual's quality of life.

51 A growing number of studies report reduced reading proficiency in children with amblyopia compared to those with normal vision development; however, prevalence of specific reading disability among amblyopes is similar to that.