Table 1.

Criteria used to classify postoperative outcomes 6-weeks following strabismus surgery.

	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.