Table 2.

Inclusion criteria.

Inclusion criteria
Population	• Children with ocular visual impairment 4–12 years • Children with cerebral visual impairment 4–12 years • Children with normal vision 4–12 years
Intervention	• (Longitudinal) Cohort • Cross sectional • Randomized controlled trials • Non-randomized controlled trials
Comparison	• Differences in viewing strategies between (age) groups • Training of viewing strategies
Outcome measurements	• Description of viewing strategy • Temporal or spatial aspects of visual processing (e.g., visual acuity, speed) • Reading strategies • Viewing strategy interventions