Effect of Spectacle Lenses with Highly Aspherical Lenslets on Binocular Vision and Accommodation in Myopic Children with and without Intermittent Exotropia

Table 4

Relative differences in fusional vergence between the two lenses in IXT and visually normal groups.

	IXT group	Visually normal group	Difference (95% CI)	T value	value
Distance
NFV break (PD)	−0.2 (2.4)	−0.5 (1.9)	0.02 (−0.12, 0.16)	0.31	0.76
NFV recovery (PD)	0.6 (1.9)	−0.6 (1.7)	0.15 (−0.02, 0.33)	1.76	0.09
PFV break (PD)	0.7 (3.3)	−0.6 (7.1)	0.03 (−0.12, 0.19)	0.47	0.64
PFV recovery (PD)	1.1 (3.2)	0.8 (5.2)	0.07 (−0.17, 0.30)	0.59	0.56
Near
NFV break (PD)	0.0 (7.1)	0.1 (3.5)	0.06 (−0.15, 0.25)	0.56	0.58
NFV recovery (PD)	−0.8 (7.9)	0.3 (3.6)	0.04 (−0.30, 0.38)	0.24	0.81
PFV break (PD)	−1.9 (6.7)	−1.9 (6.7)	0.00 (−0.14, 0.14)	0.01	0.99
PFV recovery (PD)	0.0 (3.7)	−1.3 (6.3)	0.12 (−0.14, 0.38)	0.98	0.34

Data are presented as means (SDs). Absolute differences are defined as HAL—SVL; relative differences are defined as absolute differences/values of SVL. Abbreviations: IXT, intermittent exotropia; HAL, spectacle lenses designed with highly aspherical lenslets; SVL, single vision spectacle lenses; NFV, negative fusional vergence; PFV, positive fusional vergence; PD, prism diopters.