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Oculomotor Training Improves Reading Eye Movement

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ClinicalTrials.gov Identifier: NCT02981875
Recruitment Status : Completed
First Posted : December 5, 2016
Last Update Posted : August 4, 2020
Sponsor:
Information provided by (Responsible Party):
Carly Lam, The Hong Kong Polytechnic University

Brief Summary:
Children with reading eye movement problems were recruited for this study. The treatment group was provided with oculomotor training for 8 weeks, the control group was given placebo exercises.

Condition or disease Intervention/treatment Phase
Ocular Motility Disorders Other: oculomotor training Other: placebo Not Applicable

Detailed Description:

Purpose of study Reading is one of the integral elements for learning and poor readers were reported to have less efficient reading eye movements. They were typically characterized by having higher number in fixation and regression, reduced reading speed and perceptual span. The purpose of this study was to investigate if vision therapy which limited to training of oculomotor skills can improve reading eye movement.

Methodology This was a randomized, prospective study. 30 subjects aged from 8-9 years of age with reading difficulties and reading eye movement problems were recruited. They all have normal intelligence and ocular health, but failed to meet the Taylor reading eye movement norms when tested with the Visagraph III. The subjects were randomly assigned into either the treatment group (15) or the control group (15). The treatment group had to go through a course of oculomotor vision therapy and the control group was given placebo exercises. Vision therapy for the treatment group involved 8 weeks of training (office training - 3 times a week, 30 min per session; home training - 4 times a week, 30 min per session). Office training involved the use of Vis-Flex (Visual Flexibility Trainer - an electronic device with L.E.D. lights which can display various flashing patterns at variable speeds). Home training involved several saccadic eye movement exercises. Subjects and parents were also asked to grade the reading symptoms checklist before and after the training.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 30 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: Oculomotor Training Improves Reading Eye Movement
Actual Study Start Date : January 1, 2015
Actual Primary Completion Date : September 30, 2016
Actual Study Completion Date : September 30, 2019

Arm Intervention/treatment
Experimental: experimental
oculomotor training
Other: oculomotor training
a sequence of vision training exercises which focused mainly in oculomotor skill

Placebo Comparator: control
placebo vision training exercises
Other: placebo
placebo vision training exercises involving minimal accommodation and vergence eye movement.




Primary Outcome Measures :
  1. Change in number of fixation and regression during reading after 8 weeks of oculomotor training [ Time Frame: 8 weeks ]
    number of fixation and regression is measured by Visagraph per 100 words


Secondary Outcome Measures :
  1. Change in reading rate during reading after 8 weeks of oculomotor training [ Time Frame: 8 weeks ]
    reading rate in number of words/min and fixation duration measured in seconds

  2. Change in perceptual span (words per fixation) during reading after 8 weeks of oculomotor training [ Time Frame: 8 weeks ]
    perceptual span measured in words per fixation

  3. Change in fixation duration (seconds) during reading after 8 weeks of oculomotor training [ Time Frame: 8 weeks ]
    fixation duration measured in seconds

  4. Change in symptom scores after 8 weeks of oculomotor training [ Time Frame: 8 weeks ]
    symptom scores is calculated with a scale of 0 to 4 for all the 8 items of manifested symptoms



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Ages Eligible for Study:   8 Years to 9 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Reported by teachers or parents to have reading difficulties and failed to meet the Taylor reading eye movement norms when tested with the Visagraph III (below age norm for both fixation and regression number).
  • Studying in mainstream primary schools (8-9 years of age)
  • With normal near visual acuities for both eyes (with or without spectacles)
  • Hyperopia below +4.00 D
  • Myopia below -4.00 D
  • Astigmatism below -2.00 D
  • Anisometropia less than 2.0 D difference between the two eyes
  • Near heterophoria within 0-4 exophoria
  • Vertical heterophoria less than 1 prism dioptre
  • Monocular amplitude of accommodation over 10 D in both eyes
  • With parents who were willing to perform vision therapy exercises for the children at home on a regular basis
  • Both genders were acceptable as Eden et al (1994) stated that gender had no effect on oculomotor skills

Exclusion criteria:

  • With strabismus
  • Presence of eye diseases
  • History of dyslexia (learning disability) or developmental delay

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02981875


Sponsors and Collaborators
The Hong Kong Polytechnic University
Investigators
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Principal Investigator: Carly SY Lam The Hong Kong Polytechnic University
Publications:

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Responsible Party: Carly Lam, Professor, The Hong Kong Polytechnic University
ClinicalTrials.gov Identifier: NCT02981875    
Other Study ID Numbers: HongKongPUVT
First Posted: December 5, 2016    Key Record Dates
Last Update Posted: August 4, 2020
Last Verified: August 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Keywords provided by Carly Lam, The Hong Kong Polytechnic University:
reading eye movement
Additional relevant MeSH terms:
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Ocular Motility Disorders
Central Nervous System Diseases
Nervous System Diseases
Cranial Nerve Diseases
Eye Diseases