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Table 2 Inclusion criteria

From: Effectiveness of screening preschool children for amblyopia: a systematic review

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