Table 3.

Measurement Floors, Dynamic Ranges to Floors, and Steps Within the Dynamic Ranges for OCT and OCTA Metrics.

	Measurement Floor	Mean MD (dB) at Measurement Floor	Absolute Dynamic Range	Relative Dynamic Range (%)	Steps to the Measurement Floor	CRw
OCT Metrics
RNFL, µm	60.1	−17.8 ± 0.927	28.1	31.8	7.20	3.90b
GCIPL, µm	54.0a	−23.6 ± 1.14	23.5	30.4	7.33	3.21c
Peripapillary OCTA Metrics
Custom
pVAD	0.211	−17.6 ± 1.06	0.139	39.8	2.14	0.065d
Commercial
pPDZ	0.322a	−26.6 ± 1.53	0.102	24.1	4.25	0.024d
Macular
OCTA Metrics
Custom
mVAD	0.322a	−21.8 ± 1.03	0.151	31.9	3.87	0.039d
mVSD	0.118a	−22.0 ± 1.03	0.069	36.7	3.81	0.018d
Commercial
mPDZ	0.358a	−24.9 ± 1.03	0.068	15.9	1.26	0.054d
mVDZ	14.8a	−24.2 ± 1.03	2.94	16.5	1.37	2.14d

^aMeasurement floors were estimated for these metrics using an arbitrary change-point MD of −20 dB per protocol delineated in text. Mean MD across measurement floors are reported with standard errors.

^bDerived from Mwanza et al. (2010)³⁰.

^cDerived from pooled test-retest standard deviation data from Mwanza et al. (2011)³¹.

^dThese CRw values were derived from repeatability data sets comprising non-glaucoma subjects at the USC Roski Eye Institute¹⁵.

MD = mean deviation, CRw = coefficient of repeatability, OCT = optical coherence tomography, RNFL = retinal nerve fiber layer, µm = micrometers, GCIPL = ganglion cell-inner plexiform layer, OCTA = optical coherence tomography angiography, pVAD = peripapillary vessel area density, pPD^Z = peripapillary perfusion density, mVAD = macular vessel area density, mVSD = macular vessel skeleton density, mPD^Z = macular perfusion density, mVD^Z = macular vessel density.