Ametropic amblyopia
myopia > -6.00 D (Pediatric BCSC, > -3.00 D per Donahue et al.1)
hypermetropia > +5 D (Pediatric BCSC, > +3.50 D per Donahue et al.1)
astigmatism > 2 D (Pediatric BCSC, > +1.50 D per Donahue et al.1).
Anisometropic amblyopia
myopia > -6.00 D (Pediatric BCSC, > -3.00 D per Donahue et al.1).
hypermetropic > 1-2 D (Pediatric BCSC, Donahue et al.1)
astigmatism > 1-2 D (Pediatric BCSC, Donahue et al.1)
oblique astigmatism > 1 D (Pediatric BCSC, Donahue et al.1)