Abstract
Periodic visual screening in paediatrics has been traditionally directed at preschoolers for the early detection of amblyopia (a reduction in the quality of central corrected vision resulting from a disturbance in retinal image formation) (1). The two most common causes of this visual loss are strabismus and unequal refractive error. Amblyopia has a prevalence of approximately 1% to 5% and is the leading cause of unilateral vision loss in the 20- to-70-year-old age group.