RecruitingNot ApplicableNCT05600140

Viewing Strategy Training in Children With (Cerebral) Visual Impairment

Viewing Strategy Training in Children With (Cerebral) Visual Impairment: From Spontaneous Eye Movements to a Structured Viewing Strategy

Sponsor

Royal Dutch Visio

Enrollment

60 participants

Start Date

Oct 25, 2024

Study Type

INTERVENTIONAL

Conditions

Vision, Low Vision Disorders

Summary

Viewing strategies are strategies used to process visual Information. Many children with visual impairment seem to lack systematic viewing strategies. However, it is unknown how viewing strategies differ between children with normal vision and children with (cerebral) visual impairment. In addition, viewing strategy training is often adopted in clinical practice, but till date there is no scientific evidence about effectiveness of this approach. The current project has two goals: (1) to measure viewing strategies used by children with normal vision, children with ocular visual impairment and children with CVI, and (2) to evaluate whether training viewing strategies results in more efficiënt visual Information processing.

Eligibility

Min Age: 5 YearsMax Age: 12 Years

Inclusion Criteria15

Age 5-12 years
linear distant visual acuity of 0.1 logMAR or better
Verbal IQ above 70
Absence of developmental disorders or psychiatric problems like ASS or AD(H)D
Age 5-12 years
Children with linear distance visual acuity better \<=1.3logMAR and \>0.1 logMAR
Intact central visual field (at least \> 30 degrees)
Children with a verbal IQ above 70
Absence of developmental disorders or psychiatric problems like ASS or AD(H)D
Age 5-12 years
Linear distance visual acuity \<=0.3 logMAR
Having the diagnosis CVI (verified by ophthalmologists)
Children with a verbal IQ above 70
Absence of psychiatric problems like ASS or AD(H)D
Additional inclusion criterion for study 2 (evaluating training effectiveness): children with (cerebral) visual impairment should have an indication for viewing strategy training. Training should not be indicated if children have no problems performing academic tasks (i.e. when speed and accuracy of visual processing is within the normal range). The age range for study 2 is 5-9 years.

Exclusion Criteria7

Children with VI: linear near visual acuity \>1.0 logMAR
Children with visual field defect \< 30 degrees
Children with a verbal IQ below 70
Children who attended a form of vision training in the past two years
Children with psychiatric problems like ASS or AD(H)D
Auditory impairment or language impairments
Major life events during training

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Interventions

BEHAVIORALViewing strategy training

Children receive a visual training of viewing strategies (six weeks, 2 times a week, 30 minutes). During the training, children are instructed to use specific viewing strategies (looking in a structured direction which fits the task at hand, zooming in and out / change of visual selective attentional field, visual discrimination). The verbal instructions and exercises are protocol-based. A textbook is used to describe the reactions of the children during training.