Table 1.
Test | Binocular Summation (BiS score >5 letters) | Indeterminate (−5 letters< BiS score <+5 letters) | Binocular Inhibition (BiS score < −5 letters) |
---|---|---|---|
ETDRS | 5% | 89% | 5% |
2.5% LCA | 13% | 76% | 10% |
1.25% LCA | 12% | 65% | 23% |
BI: binocular inhibition; BiS: binocular summation; ETDRS: early treatment diabetic retinopathy study (high contrast visual acuity); LCA: low contrast acuity