Table 2.

The preoperative and postoperative results of the total fovea-disa angle, Up-down gaze deviation, Right side, Left side before and after surgery

	Total fovea-disa angle (°)			difference of deviation between up and down gaze a (△)			lateral incomitance at right gaze b (△)			lateral incomitance at left gaze b (△)
	Preop	Postop	P	Preop	Postop	P	Preop	Postop	P	Preop	Postop	P
Group A (n = 22)	−11.4 ± 4.95	− 10.8 ± 4.48	0.519	− 1.23 ± 2.45	−0.82 ± 1.92	0.488	− 0.32 ± 1.99	− 0.68 ± 1.84	0.589	− 0.55 ± 1.60	− 0.73 ± 2.03	0.758
Group B (n = 18)	−11.8 ± 4.97	− 13.2 ± 3.43	0.264	− 1.53 ± 3.52	− 1.13 ± 1.89	0.710	0.27 ± 2.76	− 0.73 ± 1.53	0.231	0.13 ± 1.73	−0.47 ± 1.96	0.384
Group C (n = 18)	−10.5 ± 6.55	−12.6 ± 3.41	0.213	−1.55 ± 4.50	0.18 ± 3.52	0.430	−0.64 ± 3.53	−0.18 ± 0.75	0.676	−0.27 ± 3.41	− 0.73 ± 1.68	0.708
P	0.911	0.370		0.950	0.359		0.669	0.623		0.648	0.911

^athe deviation at up gaze minus the deviation at down gaze

For example, 8^△ exotropia(−8^△) at up gaze and 6^△ (−6^△) exotropia at down gaze, a = (− 8^△) -(− 6^△) = −2^△

6^△ exotropia (− 6^△) at up gaze and 8^△ (− 8^△) exotropia at down gaze, a = (− 6^△) -(− 8^△) = 2^△

^bthe deviation in the primary position minus the deviation at the right or the left gaze

For example, 8^△ exotropia(− 8^△) in the primary position and 6^△ (− 6^△) exotropia at the left gaze, b = (− 8^△) -(− 6^△) = − 2^△