Table 1.
Historical clinical characteristics at presentation of 61 children who underwent surgery for intermittent exotropia in Olmsted County, Minnesota
| Number of boys (%)/girls (%) | 19(31)/742 (69) |
| Number born prematurely (%) | 4/52 (7.7) |
| Mean birth weight in grams (range) | 3,288 (953–4330) |
| Mean age in years at diagnosis (range) | 4.3 (1–18.6) |
| Number with amblyopia (%) | 4 (6.6) |
| Mean initial angle of horizontal deviation at distance (range) | 20Δ (10Δ–45Δ) |
| Mean initial angle of horizontal deviation at near (range) | 14Δ (0Δ–45Δ) |
| Number with inferior oblique dysfunction (%) | 9 (14.8) |
| Number with dissociated vertical deviation (%) | 3 (4.9) |
| Mean cycloplegic refraction (spherical equivalent) (range) | +0.5 D (−7.8 D to +3.1 D) |