Table 2 Dark–light changes in ocular biometry using IOL master and AS-OCT prior to laser iridotomy

Parameter	Dark	Light	Difference (95% CI)	p
Mean lens position (mm)	0.96	0.97	0.01 (−0.06 to 0.09)	0.70
Mean ACD (mm)	2.08	2.08	0 (−0.03 to 0.0.43)	0.86
Mean corneal thickness (mm)	0.59	0.59	0 (−0.01 to 0.01)	1.00
Mean AOD₅₀₀ (μm)	43.0	124.4	81.4 (46.0 to 116.8)	<0.001
Mean TISA₇₅₀ (mm²)	0.024	0.075	0.051 (0.03 to 0.07)	<0.001

ACD, anterior chamber depth; AOD₅₀₀, angle opening distance at 500 μm anterior to the scleral spur; TISA₇₅₀, trabecular-iris space area up to 750 μm from the scleral spur.