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

Table 2

Binocular vision and accommodative parameters with HAL or SVL in the IXT group.

	HAL	SVL	Difference (95% CI)	T Or z value	Value
Distance
NFV break (PD)	13.4 (5.2)	13.6 (5.5)	−0.2 (−1.3, 0.9)	−0.38	0.71
NFV recovery (PD)	12.2 (3.4)	11.5 (3.6)	0.6 (−0.3, 1.6)	1.38	0.19
PFV break (PD)	16.3 (11.4)	15.6 (10.7)	0.7 (−0.9, 2.2)	0.92	0.37
PFV recovery (PD)	16.7 (9.7)	15.7 (9.7)	1.1 (−0.8, 3.0)	1.22	0.25
Convergence reserve ratio^†	1.08 (0.58)	0.90 (1.43)		−0.28^‡	0.78
Near
NFV break (PD)	20.1 (8.2)	20.1 (8.8)	0.0 (−3.3, 3.3)	0.02	0.99
NFV recovery (PD)	16.4 (6.9)	17.2 (7.3)	−0.8 (−4.9, 3.3)	−0.41	0.69
PFV break (PD)	22.7 (13.4)	24.6 (14.2)	−1.9 (−5.0, 1.2)	−1.26	0.22
PFV recovery (PD)	20.2 (8.7)	20.3 (9.8)	0.0 (−2.4, 2.3)	−0.04	0.97
Convergence reserve ratio^†	0.89 (1.29)	1.04 (1.33)		−1.44^‡	0.15
NPC (cm)	5.19 (1.34)	5.11 (1.09)	0.08 (−0.16, 0.31)	0.67	0.51
Binocular AA (D)	15.42 (3.03)	16.06 (3.14)	−0.64 (−1.60, 0.31)	−1.41	0.17
Monocular AA (D)	13.21 (2.53)	13.59 (3.13)	−0.38 (−1.04, 0.28)	−1.19	0.25
AR (D)	1.69 (0.30)	1.67 (0.40)	0.02 (−0.25, 0.29)	0.16	0.88
AMF (D)	0.27 (0.06)	0.23 (0.08)	0.04 (0.03, 0.05)	6.80	0.001

Data are presented as means (SDs), and ^†data are presented as medians (IQRs), ^‡z value. 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; NPC, near point of convergence; AA, accommodative amplitude; AR, accommodative response; AMF, accommodative microfluctuation; D, diopters; PD, prism diopters.