Table 1.
Success (All criteria must be met) | Partial success (All criteria must be met) | Failure (If any one criterion met) | |
---|---|---|---|
Motor criteria | |||
Angle of deviation by SPCT* distance | < 10 prism diopters | ≤ 15 prism diopters | > 15 prism diopters |
Angle of deviation by SPCT near | < 10 prism diopters | ≤ 15 prism diopters | > 15 prism diopters |
Diplopia criteria | |||
Diplopia / visual confusion primary position distance | None or “rare” | None, “rare” or “sometimes” | “Always” or “often” |
Diplopia / visual confusion reading | None or “rare” | None, “rare” or “sometimes” | “Always” or “often” |
Prism | Not allowed | Allowed | Not applicable |
Bangerter foil / occlusion | Not allowed | Not allowed | Allowed |
Health-related quality of life criteria | |||
Psychosocial and function AS-20** scales | Exceeds 95% LOA † on either psychosocial or function scale | Exceeds 50% LOA on either psychosocial or function scale | Does not exceed 50% LOA on both psychosocial and function scales |
SPCT = Simultaneous Prism and Cover Test
AS-20 = Adult Strabismus-20 health-related quality of life questionnaire
LOA = Limits of agreement.
95% limits of agreement are: 17.7 points for the psychosocial scale and 19.5 points for the function scale.
50% limits of agreement are: 6.1 points for the psychosocial scale and 6.7 points for the function scale.