Table 2.
Expected clinical findings of Scheiman and Wick.12
| Clinical test | Expected finding (value ± SD) |
|---|---|
| Phoria | Distance: 1Exo ± 2Δ Near: 3Exo ± 3Δ |
| Positive Fusional Vergence (Base Out) Distance | Break: 23 ± 8Δ Recovery: 16 ± 6Δ |
| Negative Fusional Vergence (Base In) Distance | Break: 12 ± 5Δ Recovery: 7 ± 4Δ |
| Positive Fusional Vergence (Base Out) Near | Break: 23 ± 8Δ Recovery: 16 ± 6Δ |
| Negative Fusional Vergence (Base In) Near | Break: 12 ± 5Δ Recovery: 7 ± 4Δ |
| Near Point of Convergence (NPC) | Break: 2.5 ± 2.5 cm |
| Monocular Estimation Method (MEM) | +0.50 ± 0.25 D |
| Accommodative Facility (8–12-year-olds) | Monocular: 7 ± 2.5 cycles per minute (cpm) Binocular: 5 ± 2.5 cycles per minute (cpm) |