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Guidelines for Automated Preschool Vision Screening
Failure Criteria for Refractive Amblyopia Risk Factors
| Age, months | Astigmatism (D) | Hyperopia (D) | Anisometropia (D) | Myopia (D) |
|---|---|---|---|---|
| 12-30 | > 2.0 | >4.5 | >2.5 | > -3.5 |
| 31-48 | >2.0 | >4.0 | >2.0 | > -3.0 |
| 48 | >1.5 | >3.5 | >1.5 | > -1.5 |
Failure Criteria for other Amblyopia Risk Factors
| Age | Nonrefractive risk factors |
|---|---|
| All | Manifest strabismus > 8 Prism Diopters in primary position |
| All |