Table 2.

Prism cover test and duction deficit examination findings pre and 3 months post single surgery for the 35 patients

Prism cover tests	Preoperatively	3 months postoperatively	p-value (Wilcoxon signed-rank test)
Angle of vertical deviation in PP, median (IQR)	20Δ (15, 30Δ)	1Δ (0, 3Δ)	<0.001*
Angle of vertical deviation in downgaze, median (IQR)	15Δ (8, 22Δ)	1Δ (0, 3Δ)	<0.001*
Angle of horizontal deviation in PP, median (IQR)	7Δ (2, 16Δ)	2Δ (0, 4Δ)	<0.001*
Angle of horizontal deviation in downgaze, median (IQR)	6Δ (1.8, 12.5Δ)	1Δ (0–2Δ)	<0.001*
Mean ductions
Hypertropic eye downgaze duction, median (IQR)	0 (−0.5, 0)	0 (0, 0)	0.275
Hypotropic eye downgaze duction, median (IQR)	0 (0, 0)	0 (0, 0)	0.054
Hypertropic eye upgaze duction, median (IQR)	−1 (−2.5, −1)	−1 (−1.5, 0)	0.146
Hypotropic eye upgaze duction, median (IQR)	−3 (−4, −2.5)	−1 (−2, −0.5)	<0.001*

Δ prism dioptres, PP primary position, IQR inter-quartile range