Table 1.

Amblyopia risk factors determined with SVS in 3-year-old by the Japan Ophthalmologists Association and Nakano City.

	Refractive risk factor (D)						Strabismus (PD)
	Hyperopia SE	Myopia SE	Hyperopia	Myopia	Astigmatism	Anisometropia	V	I	O
Current criteria (≤)	2.5	1.25	–	–	1.75	1.0	8	5	8
Academic criteria (≤)	2.5	2.0	–	–	2.0	1.5	8	5	8
Spherical power criteria (<)	–	–	2.0	2.0	2.0	2.0	7	7	7
Nakano City criteria (≤)	–	–	2.5	2.0	2.0	1.5	8	5	8

D = diopter, I = inside, O = outside, PD = prism diopter, SE = spherical equivalent, SVS = Spot^™ Vision Screener, V = vertical.