What are the symptoms of amblyopia (lazy eye)?

A child with amblyopia has little or no symptoms. Hence, screening is essential to detect it. In Singapore, a vision screen is done at the age of four by the polyclinics. Annual vision testing is also performed in schools for children starting from five years and above. Children with poor vision are then referred to either the refraction clinic at the Health Promotion Board or to a paediatric eye clinic.