Table 2.

Deviation in vertical alignment in field of action gaze position before and 6 weeks after graded partial tenotomy of vertical rectus muscles for treatment of hypertropia

Patient no.	Preop deviation (PD)	Treated muscle	Postop deviation (PD)	Postop change (PD)
1	LHT 8	LSR	ORTHO	−8
2	RHT 12	RSR	RHT 10	−2
3	LHT 7	LSR	LHT 2	−5
3	LHT 3	RIR	ORTHO	−3
4	RHT 7	LIR	RHT 6	−1
5	RHT 4	LIR	ORTHO	−4
6	LHT 6	RIR	LHT 4	−2
7	LHT 6	RIR	N/A	N/A
8	LHT 14	LSR	LHT 7	−7
8*	LHT 8	LSR	LHT 6	−2
8*	LHT 14	RIR	LHT 12	−2
9	LHT 12	RIR	RHT 2	−10
10	RHT 2	LIR	ORTHO	−2
11	RHT 9	RSR	ORTHO	−9
12	RHT 6	RSR	ORTHO	−6
13	LHT 6	RIR	ORTHO	−6
14	RHT 2	LSR	ORTHO	−2
15	RHT 4	RSR	RHT 3	−1
16	LHT 6	RIR	LHT 2	−4
17	LHT 14	LSR	LHT 2	−12
17*	LHT 10	RIR	ORTHO	−10
18	LHT 9	LSR	LHT 3	−6
19	RHT 8	LIR	N/A	N/A
20	RHT 5	LIR	ORTHO	−5
21	LHT 10	LSR	ORTHO	−10
22	RHT 20	RSR†	ORTHO	−20
23	LHT 2	LSR	LHT 4	2
23*	LHT 8	LSR	LHT 9‡	1
23*	LHT 8	RIR	LHT 9‡	1
24	RHT 14	LIR	ORTHO	−14
Average	8 PD		3 PD	−5 PD
95% CI	7-10 PD		1-4 PD	−3 to −7 PD
SD	4 PD		4 PD	5 PD

CI, confidence interval; LHT, left hypertropia; LIR, left inferior rectus; LSR, left superior rectus; N/A, not assessed (patient unable to return for 6-week visit); ORTHO, orthotropia; PD, prism diopters; Preop, preoperative; Postop, postoperative; RHT, right hypertropia; RIR, right inferior rectus; RSR, right superior rectus; SD, standard deviation.

^*Second procedure.

^†Combined with a recession of LIR, and resection of the LSR.

^‡Patient could tolerate measurement only in primary gaze.