Table 2.

Inclusion criteria

Population	Children from the general population up to the age of six years
Intervention	Comparison of screening versus no screening or Comparison of different screening strategies
Type of study	Randomised controlled trials Non-randomised intervention studies Controlled cohort studies
Outcome measurements	Prevalence rate of amblyopia measured by visual acuity Quality of life (e.g., psychosocial or emotional impairment, labelling, social isolation) Cognitive and educational development Adverse effects related to screening