Table 3.

Effect of illuminance and refractive state on visual acuity showing mean change in LogMAR score from reference level (500 lx). β values are provided for reference with the model provide earlier

		Coefficient	Standard error	p value
Intercept β 0		0.086	0.023	< 0.001
Log (illuminance) β 01		−0.060	0.006	< 0.001
Refractive state β 02l	0	Reference
	l = 1	0.072	0.018	< 0.001
	l = 2	0.310	0.026	< 0.001
	l = 3	0.641	0.035	< 0.001
Log(Illum)*Refractive state β 03l	0	Reference
	l = 1	−0.010	0.005	0.040
	l = 2	−0.037	0.005	< 0.001
	l = 3	−0.0643	0.0048	< 0.001