Table 4.

Values of normality for confocal findings in naïve subjects

Parameter	Value of normality, mean ± SD	References
Basal epithelium (cells/mm2 )	5623 ± 389	Martone et al. [18]
	5823 ± 602	Patel et al. [36]
	6333 ± 604	Ceresara et al. [37]
	8916.7 ± 645.8	Hu et al. [38]
	8996 ± 1532	Eckard et al. [39]
Nerve fibers (fibers/frame)	2.9 ± 0.8	De Cillà et al. [40]
	3.8 ± 0.7	Bucher et al. [41]
	5.26 ± 1.3	Martone et al. [18]
	5.85 ± 2.04	Ceresara et al. [37]
	5.9 ± 0.7	Kurbanyan et al. [42]
Nerve fiber density (fibers/mm2)	31.9 ± 94	Hertz et al. [43]
Nerve tortuosity (grade 0–4)	1.2 ± 0.39	Martone et al. [18]
	1.8 ± 0.7	Kurbanyan et al. [42]
	2.0 ± 0.8	De Cillà et al. [40]
	2.3 ± 0.6	Ceresara et al. [37]
Nerve reflectivity (grade 0–4)	2.07 ± 0.9	Martone et al. [18]
	2.6 ± 0.9	De Cillà et al. [40]
Dendritic cell density (cells/mm2)	34 ± 3	Zhivov et al. [39]
	34.9 ± 5.7	Lin et al. [44]
Endothelial density (cells/mm2)	2539 ± 338	Salvetat et al. [45]
	2968 ± 385	Ceresara et al. [37]
	3105 ± 497	Hu et al. [38]

SD standard deviation