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Clinical Trials/NCT02981875
NCT02981875CompletedNot Applicable

Oculomotor Training Improves Reading Eye Movement

The Hong Kong Polytechnic University0 sites30 target enrollmentStarted: January 1, 2015Last updated:
Conditions
Interventions

Trial Snapshot

Phase
Not Applicable
Status
Completed
Enrollment
30
Primary Endpoint
Change in number of fixation and regression during reading after 8 weeks of oculomotor training

Study Overview

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.

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.

Study Design

Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel
Primary Purpose
Treatment
Masking
Single (Participant)

Eligibility Criteria

Ages
8 Years to 9 Years (Child)
Sex
All
Accepts Healthy Volunteers
Yes

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

Arms & Interventions

experimental

Experimental

oculomotor training

Intervention: oculomotor training (Other)

control

Placebo Comparator

placebo vision training exercises

Intervention: placebo (Other)

Outcomes

Primary Outcomes

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 Outcomes

  • Change in reading rate during reading after 8 weeks of oculomotor training(8 weeks)
  • Change in perceptual span (words per fixation) during reading after 8 weeks of oculomotor training(8 weeks)
  • Change in fixation duration (seconds) during reading after 8 weeks of oculomotor training(8 weeks)
  • Change in symptom scores after 8 weeks of oculomotor training(8 weeks)

Investigators

Sponsor Class
Other
Responsible Party
Principal Investigator
Principal Investigator

Carly Lam

Professor

The Hong Kong Polytechnic University

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