Macular perfusion density evaluation in constant and intermittent exotropia by means of optical coherence tomography angiography

Table 2 Comparison of macular vessel density between the study eyes and control eyes in each group

Items	XT group		p	IXT group		p	Control group		p
Items	Study eye	Control eye	p	Study eye	Control eye	p	Study eye	Control eye	p
6 × 6-mm OCTA macular scans
SCP (%, Mean ± SD)	50.38 ± 2.42	51.04 ± 2.44	0.232	50.81 ± 2.45	50.12 ± 2.90	0.216	51.04 ± 2.49	50.73 ± 2.04	0.400
DCP (%, Mean ± SD)	43.81 ± 3.24	52.38 ± 4.86	< 0.001	47.22 ± 6.89	49.04 ± 7.27	0.190	51.09 ± 5.30	50.86 ± 4.42	0.805
3 × 3-mm OCTA macular scans
SCP (%, Mean ± SD)	47.12 ± 1.90	48.77 ± 2.18	0.032	47.76 ± 2.82	48.63 ± 2.21	0.055	48.26 ± 2.34	48.20 ± 2.48	0.901
DCP (%, Mean ± SD)	51.22 ± 3.60	52.69 ± 4.10	0.193	51.13 ± 4.19	51.62 ± 3.45	0.471	53.83 ± 2.54	54.15 ± 2.65	0.413
FAZ parameters
Area (mm²)	0.25 ± 0.10	0.26 ± 0.11	0.350	0.27 ± 0.09	0.30 ± 0.09	0.114	0.27 ± 0.10	0.27 ± 0.09	0.653
Perimeter (mm)	1.95 ± 0.43	2.00 ± 0.42	0.389	2.02 ± 0.34	2.09 ± 0.38	0.161	2.05 ± 0.36	1.99 ± 0.45	0.351
AI	1.12 ± 0.03	1.14 ± 0.06	0.225	1.12 ± 0.04	1.13 ± 0.04	0.172	1.12 ± 0.03	1.13 ± 0.06	0.358
Macular thickness (μm, Mean ± SD)	310.00 ± 15.69	307.94 ± 16.18	0.119	312.71 ± 13.60	313.13 ± 14.14	0.638	308.03 ± 12.94	309.22 ± 13.85	0.078

XT constant exotropia, IXT intermittent exotropia, OCTA optical coherence tomography angiography, SCP superficial capillary plexus, DCP deep capillary plexus, FAZ foveal avascular zone, AI acircularity index, SD standard deviation; p values in bold reached statistical significance

ISSN: 1471-2415