Table 2 Summary of the results of quantitative in vivo confocal microscopy studies of healthy corneal stromal nerves

Normeal stromal nerves	Nerve density (mm/mm²)	Stromal nerve diameter (μm)
Mocan et al10 (24 eyes) SSCM		5.69 (1.49)
Simo Mannion et al11 (12 eyes) SSCM	0.45 (0.11)	5.5 (1.9)
Hosal et al13 (19 eyes) SSCM		9.63 (1.88)
Benitez del Castillo et al15 SSCM
Young (11 eyes)	0.40 (0.07)0.31 (0.05)	7.64 (2.54)11.4 (2.54)
Elderly (10 eyes)	0.40 (0.07)0.31 (0.05)	7.64 (2.54)11.4 (2.54)
Oliveira-Soto and Efron2 (14 eyes) SSCM	3.61 (1.04)	6.3 (1.8)