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Completed

NCT Number: NCT05514457

Assessment of Visual Dyslexia Remediation Protocols - Dyslexia REMEDIATION

Dyslexia is first described as a phonological deficit. Several studies report a neurovisual deficit in dyslexics. Some dyslexics have a visual deficit without phonological impairment, others have a pure phonological deficit, and still others have both types of deficits. From this observation the idea emerged to propose specific remediation protocols for people with visual impairments and to assess their effects on reading. At the theoretical level, if visual stimulation is able to improve reading performance, it is the demonstration of the existence of visual origin of dyslexia. At the clinical level, such a result not only opens the prospect of a different and more adapted rehabilitation for these types of dyslexia, but also the prospect, if the visual deficits are pre-existing to the learning of reading, to use them for early diagnosis and management.

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Key information

Conditions

Dyslexia Communication Disorders Language Disorders Learning Disabilities Mental Disorders Nervous System Diseases Neurobehavioral Manifestations Neurodevelopmental Disorders Neurologic Manifestations Pathological Conditions, Signs and Symptoms Signs and Symptoms Specific Learning Disorder

Age range

8 year–12 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Centre de Recherche en Neurosciences de Lyon

Bron, Auvergne-Rhône-Alpes, 69500, France

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Male or female
  • Aged 8 to 12
  • Diagnosed dyslexics
  • Normal or corrected to normal vision
  • Legal guardians of children subjects providing their free, informed and written consent to participate in the study; With the child also giving orally his consent to participate.

Exclusion criteria

  • other neurodevelopmental problem
  • strabismus, amblyopia

For the glasses (group 2) : epileptic child are excluded

Treatment and study plan

visual stimulation with I pad

Behavioral

At the beginning of the study, for baseline condition, children will do 4 tests (visuo-spatial perception test, visual attention span, visual research, phonology tests).

In the first group of the study, the children will do visual research exercises on I pad 10 minutes per day during one month = remediation. They will also do 4 reading aloud tests, once a month, for 3 months. The remediation exercises will be realized during the first, second or third month.

visual stimulation with lamp

Behavioral

At the beginning of the study, for baseline condition, children will do the 4 tests like group 1.

In the second group of the study, the children will do reading aloud tests, with lamp adjusted with different parameters = remediation (passive visual stimulation of a specific frequency believed to promote visual processing of written symbols).

Primary outcomes

  1. reading performance

    Time frame: for arm 1: at baseline at 1 month at 2 month at 3 month For arm 2: 4 times in the same day, 4 consecutive reading sessions with a break in-between of minimum 5 minutes

    change in reading time

  2. reading performance

    Time frame: for arm 1: at baseline at 1 month at 2 month at 3 month For arm 2: 4 times in the same day, 4 consecutive reading sessions with a break in-between of minimum 5 minutes

    change in number of errors

Secondary outcomes

  1. score of Elementary Visuo-Spatial Perception test

    Time frame: one time at baseline

    comparisons of score of (lengths, sizes, angles and relative positions within and between objects). Minimum score = 36 and maximum (better) score = 72

  2. visual attention span

    Time frame: one time at baseline

    number of letters identified in a single ocular fixation (200 ms)

  3. Visual search time

    Time frame: one time at baseline

    average visual search time of symbols versus colored objects

  4. performance score on the phonology tests (EVALéo 6-15 = Evaluation of written language and oral language 6-15 years)

    Time frame: one time at baseline

    metaphonology = removal of phonemes. Minimum score = 0 and maximum (better) score = 20

Sponsors and collaborators

Lead sponsor

Hospices Civils de Lyon

Other

Registry information

Acronym: Dyslexie REMED

Important dates

Study start
2022
Primary completion
2024
Study completion
2024
First posted
Aug 24, 2022
Registry last updated
Sep 25, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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