Viewing strategy training in children with (cerebral) visual impairment

Recruitment & Eligibility

Status: Pending

Sex: Not specified

Target Recruitment: 204

Inclusion Criteria

Inclusion criteria typically developing children with normal vision:
• Age 5-12 years
• linear distant visual acuity of 0.1 logMAR or better
• No (suspicion of) intellectual impairment (e.g. verbal IQ below 70)
• No diagnosis or suspicion of developmental disorders or psychiatric problems
like ASS or AD(H)D

Inclusion criteria for children with ocular visual impairment:
• 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)
• No (suspicion of) intellectual impairment (e.g. verbal IQ below 70)
• No diagnosis or suspicion of developmental disorders or psychiatric problems
like ASS or AD(H)D

Inclusion criteria for children with cerebral visual impairment:
• Age 5-12 years
• Linear distance visual acuity <=0.3 logMAR
• Having the diagnosis CVI (verified by ophthalmologists)
• No (suspicion of) intellectual impairment (e.g. verbal IQ below 70)
• No diagnosis or suspicion of developmental disorders or 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. Age range study 2: 5-9 years.

Exclusion Criteria

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

Study & Design

Study Type: Interventional

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
<p>The following parameters will be analyzed:<br /><br>- The use of a structured viewing strategy (qualitative analysis)<br /><br>- Saccade amplitudes as measured during reading and visual search<br /><br>- Fixation behavior (spatial and temporal) during search and reading<br /><br>- Reading accuracy and speed<br /><br>- Visual search accuracy and speed</p><br>

Secondary Outcome Measures

Name	Time	Method
<p>The secondary study parameters for the intervention study are:<br /><br>- WISC-V visual processing speed index<br /><br>- Tea-Ch Speurtocht<br /><br>- Gestalt Closure (subtest Kaufman-ABC-II)<br /><br>- Plaatjes Benoemen (subtest DST-NL)</p><br>